Alpena Community College Center for Health Sciences- Van Lare Hall Renovation 17.520 9/27/2019 Plan Review and Permit SECTION 02 22 30 DEMOLITION FOR REMODELING

PART 1 GENERAL

1.1 SECTION INCLUDES A. Removal of designated building equipment and fixtures. B. Removal of designated construction. C. Disposal of materials. D. Identification of utilities. E. Refer to items schedule at end of section.

1.2 RELATED SECTIONS A. Summary: Work sequence and continued occupancy of the building. B. Execution Requirements: RE-installation of removed components. C. Division 1 - Close-Out Submittals: Project record documents.

1.3 SUBMITTALS A. See Section - Administrative Requirements for submittal procedures. B. Shop Drawings: indicate demolition; location and construction of temporary facilities. C. Project Record Documents: Accurately record actual location of capped utilities.

1.4 REGULATORY REQUIREMENTS A. Conform to applicable code for demolition work, dust control, projects requiring electrical disconnection and re-connection. B. Obtain required permits from authorities. C. Do not close or obstruct egress from any building exit or site exit. D. Do not disable or disrupt building fire or life safety systems without 3 days’ prior written notice to Owner. E. Conform to applicable regulatory procedures when hazardous or contaminated materials are discovered.

1.5 SCHEDULING A. Schedule work to coincide with new construction. B. Describe demolition removal procedures and schedule.

1.6 PROJECT CONDITIONS A. Contractor is to prepare a photo journal of all existing conditions in areas requiring work, and submit copies to the architect and owner prior to work starting. B. Conduct demolition to minimize interference with adjacent ad occupied building areas. C. Cease operations immediately if structure appears to be in danger and notify Architect. Do not resume operations until directed. D. The Architect, Construction Manager, General Contractor their consultants and their agents and employees, shall not be held responsible for the discovery, or removal of any Hazardous Materials from the existing site or buildings and shall not provide any services related to the discovery or removal of any Hazardous Materials found, The owner shall be solely responsible for discovery and removal of such material(s).

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PART 2 PRODUCTS

Dust Control Materials Noise Control Construction Materials Barricade materials Temporary shoring Other materials required by the scope of work.

PART 3 EXECUTION

3.1 PREPARATION A. Provide, erect, and maintain temporary barriers at locations indicated. B. Contractors are to provide caution at all tunnel/basement locations with equipment/weight loads and protection of tunnels, during demolition and new construction. At areas of uncovering, provide waterproofing in accordance with Division 7. C. Erect and maintain weatherproof closures for exterior openings. D. Erect and maintain temporary partitions to prevent spread of dust, odors, and noise to permit continued building occupancy. E. Project existing materials and equipment that are not to be demolished. Refer to documents. F. Prevent movement of structure; provide bracing and shoring. G. Notify affected utility companies before starting work and comply with their requirements. H. Mark location and termination of utilities. I. Coordinate mechanical, electrical and plumbing demolition with specific trades J. Provide appropriate temporary signage including signage for exit or building egress. K. Contractor is to prepare a photo journal of all existing conditions in areas requiring work, and submit copies to the architect and owner prior to work starting. L. Contractor/CM is to initiate an onsite walk through with the architect and owner to identify and mark specific areas for salvage materials, items, and equipment. These items, areas will be protected or removed and safely stored for reuse by the owner or as directed by the documents.

3.2 MAINTENANCE A. Disconnect, remove and identify designated utilities within demolition areas. B. Demolish in an orderly and careful manner. Protect existing supporting structural members. C. Remove demolished materials from site except where specifically noted otherwise. Do not burn or bury materials on site. D. Remove materials as demolition progresses. Upon completion of demolition, leave areas in clean condition. E. Remove materials to be salvaged and reused as directed by construction documents. F. Remove temporary facilities.

3.3 SCHEDULES A. CONFIRM WITH OWNER ALL ITEMS TO BE SAVED FOR RE-USE PRIOR TO DEMOLITION . See 3.1, L B. CONFIRM WITH OWNER STORAGE LOCATIONS FOR ALL ITEMS TO BE SAVED FOR RE-USE PRIOR TO DEMOLITION C. Contractor to review scope of demolition previously completed by owner. Any discrepancies with project demolition drawings to be reviewed with Owner and Architect. D. The following materials and equipment may be identified to be salvaged if approved by

Demolition for Remodeling 02.22.30 - 2 of 3 Alpena Community College Center for Health Sciences- Van Lare Hall Renovation 17.520 9/27/2019 Plan Review and Permit Client: 1. Doors and door hardware. 2. Toilet accessories. 3. Lighting. 4. Switches and Plates. 5. Toilet fixtures. 6. Signage (interior and exterior). 7. Face Brick. 8. Infill Brick. 9. Keystone at existing building entry. 10. Stone, Marble and other stone finishes 11. Wood trim 12. Cabinets and millwork items. 13. Existing classroom equipment (projectors, screens, chalk or white boards, assorted learning aids) 14. Exterior canopies. 15. Additional items as identified by Owner. Contractor/CM is to initiate an onsite walk through with the architect and owner to identify and mark specific areas for salvage materials, items, and equipment. These items, areas will be protected or removed and safely stored for reuse by the owner or as directed by the documents. Items identified as not “salvaged” are to be disposed of in an appropriate manner by the contractor.

E. Protect the following materials and equipment to remain in place: 1. All finishes at floors walls, and ceilings in areas as designated. 2. Existing construction, noted to remain. F. Salvage Existing Brick 1. Salvage as much brick as possible for re-use in existing masonry walls. Note areas identified for possible brick salvage 2. Clean mortar from salvaged brick 3. Neatly stack all salvaged brick on pallets for re-use, in a weather protected and secured area 4. Return to owner all salvaged brick that is not used. F. Salvage Existing Stone and Cast-Stone: 1. Salvage existing stone water-coursing, foundation stone, sills, and other stone components for use in repair or replacement in areas designated in the documents or as necessary by the scope of renovation and new construction. 2. Clean mortar from salvaged brick 3. Neatly stack all salvaged stone on pallets for re-use, in a weather protected and secured area 4. Return to owner all salvaged stone that is not used.

END OF SECTION 02 22 30

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SECTION 024119 - SELECTIVE DEMOLITION

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Demolition and removal of selected portions of building or structure. 2. Demolition and removal of selected site elements. 3. Salvage of existing items to be reused or recycled.

1.2 MATERIALS OWNERSHIP

A. Unless otherwise indicated, demolition waste becomes property of Contractor.

B. Historic items, relics, antiques, and similar objects including, but not limited to, cornerstones and their contents, commemorative plaques and tablets, and other items of interest or value to Owner that may be uncovered during demolition remain the property of Owner.

1. Carefully salvage in a manner to prevent damage and promptly return to Owner.

1.3 PREINSTALLATION MEETINGS

A. Pre-demolition Conference: Conduct conference at Project site.

1.4 INFORMATIONAL SUBMITTALS

A. Engineering Survey: Submit engineering survey of condition of building.

B. Proposed Protection Measures: Submit report, including Drawings, that indicates the measures proposed for protecting individuals and property, for maintaining access to and egress from the facility, for environmental protection, for dust control and, for noise control. Indicate proposed locations and construction of barriers.

C. Schedule of selective demolition activities with starting and ending dates for each activity.

D. Pre-demolition photographs or video.

E. Statement of Refrigerant Recovery: Signed by refrigerant recovery technician.

1.5 CLOSEOUT SUBMITTALS

A. Inventory of items that have been removed and salvaged.

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1.6 QUALITY ASSURANCE

A. Refrigerant Recovery Technician Qualifications: Certified by an EPA-approved certification program.

B. Personal Protective Equipment (PPE) shall be provided by the Contractor to all of the Contractor's employees and subcontractors' employees working at the site.

1.7 FIELD CONDITIONS

A. Owner will occupy portions of building immediately adjacent to selective demolition area. Conduct selective demolition so Owner's operations will not be disrupted.

B. Conditions existing at time of inspection for bidding purpose will be maintained by Owner as far as practical.

1. Before selective demolition, Owner will remove the following items:

a. Landscaping elements to be transplanted.

C. Notify Architect of discrepancies between existing conditions and Drawings before proceeding with selective demolition.

D. Hazardous Materials: It is not expected that hazardous materials will be encountered in the Work.

1. Hazardous materials will be removed by Owner before start of the Work. 2. If suspected hazardous materials are encountered, do not disturb; immediately notify Architect and Owner. Hazardous materials will be removed by Owner under a separate contract.

E. Storage or sale of removed items or materials on-site is not permitted.

F. Utility Service: Maintain existing utilities indicated to remain in service and protect them against damage during selective demolition operations.

1. Maintain fire-protection facilities in service during selective demolition operations.

G. Arrange selective demolition schedule so as not to interfere with Owner's operations.

1.8 BURNING AND EXPLOSIVES

A. Burning waste materials and the use of explosives at the site are prohibited.

1.9 REGULATORY REQUIREMENTS, PERMITS AND NOTIFICATIONS

A. The Contractor shall comply with all applicable Federal, State and local regulatory requirements related to the work.

B. Contractor shall obtain all necessary permits for the required work under this Section to comply with all Federal, State, and Local requirements.

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C. Contractor shall provide all required notices for demolition to the applicable agencies.

1.10 WARRANTY

A. Existing Warranties: Remove, replace, patch, and repair materials and surfaces cut or damaged during selective demolition, by methods and with materials 0and using approved contractors so as not to void existing warranties.

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Regulatory Requirements: Comply with governing EPA notification regulations before beginning selective demolition. Comply with hauling and disposal regulations of authorities having jurisdiction.

B. Standards: Comply with ASSE A10.6 and NFPA 241.

2.2 MATERIALS

A. Backfill Material: contractor shall provide suitable fill material to re-establish grade within the footprint of the structure(s) to match the existing grade around the building perimeter.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Verify that utilities have been disconnected and capped before starting selective demolition operations.

B. Perform an engineering survey of condition of building to determine whether removing any element might result in structural deficiency or unplanned collapse of any portion of structure or adjacent structures during selective building demolition operations.

C. Inventory and record the condition of items to be removed and salvaged.

3.2 PREPARATION

A. Refrigerant: Before starting demolition, remove refrigerant from mechanical equipment according to 40 CFR 82 and regulations of authorities having jurisdiction.

3.3 UTILITY SERVICES AND MECHANICAL/ELECTRICAL SYSTEMS

A. Existing Services/Systems to Remain: Maintain services/systems indicated to remain and protect them against damage.

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B. Existing Services/Systems to Be Removed, Relocated, or Abandoned: Locate, identify, disconnect, and seal or cap off utility services and mechanical/electrical systems serving areas to be selectively demolished.

1. Owner will arrange to shut off indicated services/systems when requested by Contractor. 2. Arrange to shut off utilities with utility companies. 3. If services/systems are required to be removed, relocated, or abandoned, provide temporary services/systems that bypass area of selective demolition and that maintain continuity of services/systems to other parts of building. 4. Disconnect, demolish, and remove fire-suppression systems, plumbing, and HVAC systems, equipment, and components indicated on Drawings to be removed.

a. Piping to Be Removed: Remove portion of piping indicated to be removed and cap or plug remaining piping with same or compatible piping material. b. Piping to Be Abandoned in Place: Drain piping and cap or plug piping with same or compatible piping material and leave in place. c. Equipment to Be Removed: Disconnect and cap services and remove equipment. d. Equipment to Be Removed and Reinstalled: Disconnect and cap services and remove, clean, and store equipment; when appropriate, reinstall, reconnect, and make equipment operational. e. Equipment to Be Removed and Salvaged: Disconnect and cap services and remove equipment and deliver to Owner. f. Ducts to Be Removed: Remove portion of ducts indicated to be removed and plug remaining ducts with same or compatible ductwork material. g. Ducts to Be Abandoned in Place: Cap or plug ducts with same or compatible ductwork material and leave in place.

3.4 CONSTRUCTION AREA

A. The construction areas are limited to the specific site described in this specification and shown on other included documents.

B. Contractor is responsible for fencing, barricading, and installing any other measures necessary to protect the public from debris and prevent access to the site by the public.

C. Any damage to property not part of the demolition project as a result of the contractor's negligence shall be repaired or replaced at no expense to the Owner.

3.5 PROTECTION

A. During the demolition work, the Contractor shall continuously evaluate the conditions of the structure being demolished and take immediate action to protect all personnel working in and around the demolition site. No area, section, or component of floors, roofs, walls, columns, pilasters, or other structural elements will be allowed to be left standing without sufficient bracing, shoring, or lateral support to prevent collapse or failure while workmen remove debris or perform other work in the immediate area. Floors, roofs, walls, columns, pilasters, and other structural components that are designed and constructed to stand without lateral support of shoring, and are determined to be in stable condition, may be allowed to remain standing without additional bracing, shoring or lateral support until demolished. The Contractor shall ensure that no elements determined to be unstable are left unsupported and shall be responsible for placing and securing bracing, shoring, or lateral supports as may be required because of any cutting, removal, or demolition work performed under this contract. The Contractor shall ensure that structural elements are not overloaded and be responsible for

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increasing structural supports or adding new supports as may be required because of any cutting, removal or, demolition work performed under any part of this contract.

B. Temporary Protection: Provide temporary barricades and other protection required to prevent injury to people and damage to adjacent buildings and facilities to remain.

C. Temporary Shoring: Design, provide, and maintain shoring, bracing, and structural supports as required to preserve stability and prevent movement, settlement, or collapse of construction and finishes to remain, and to prevent unexpected or uncontrolled movement or collapse of construction being demolished.

D. Remove temporary barricades and protections where hazards no longer exist.

E. Dust Control: Employ adequate engineering controls to prevent visible emissions of dust and to avoid migration of airborne materials. Use of water will not be permitted when it will result in, or create, hazardous or objectionable conditions such as ice, flooding, pollution, and/or electrical shock.

3.6 SELECTIVE DEMOLITION

A. General: Demolish and remove existing construction only to the extent required by new construction and as indicated. Use methods required to complete the Work within limitations of governing regulations and as follows:

1. Neatly cut openings and holes plumb, square, and true to dimensions required. Use cutting methods least likely to damage construction to remain or adjoining construction. Use hand tools or small power tools designed for sawing or grinding, not hammering and chopping. Temporarily cover openings to remain. 2. Cut or drill from the exposed or finished side into concealed surfaces to avoid marring existing finished surfaces. 3. Do not use cutting torches until work area is cleared of flammable materials. At concealed spaces, such as duct and pipe interiors, verify condition and contents of hidden space before starting flame-cutting operations. Maintain portable fire-suppression devices during flame-cutting operations. 4. Maintain fire watch during and for at least 1 hour after flame-cutting operations. 5. Locate selective demolition equipment and remove debris and materials so as not to impose excessive loads on supporting walls, floors, or framing. 6. Dispose of demolished items and materials promptly. Comply with requirements in Section 017419 "Construction Waste Management and Disposal."

B. Site Access and Temporary Controls: Conduct selective demolition and debris-removal operations to ensure minimum interference with roads, streets, walks, walkways, and other adjacent occupied and used facilities.

C. Removed and Salvaged Items:

1. Clean salvaged items. 2. Pack or crate items after cleaning. Identify contents of containers. 3. Store items in a secure area until delivery to Owner. 4. Transport items to Owner's storage area designated by Owner. 5. Protect items from damage during transport and storage.

D. Removed and Reinstalled Items:

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1. Clean and repair items to functional condition adequate for intended reuse. 2. Pack or crate items after cleaning and repairing. Identify contents of containers. 3. Protect items from damage during transport and storage. 4. Reinstall items in locations indicated. Comply with installation requirements for new materials and equipment. Provide connections, supports, and miscellaneous materials necessary to make item functional for use indicated.

E. Existing Items to Remain: Protect construction indicated to remain against damage and soiling during selective demolition. When permitted by Architect, items may be removed to a suitable, protected storage location during selective demolition and cleaned and reinstalled in their original locations after selective demolition operations are complete.

1. Any damage to existing features to remain shall be repaired or replaced as approved by the Owner and Architect at the cost to the Contractor.

3.7 CLEANING

A. Remove demolition waste materials from Project site, unless otherwise specified or directed by the Owner, and recycle or dispose of them according to Section 017419 "Construction Waste Management and Disposal."

1. Do not allow demolished materials to accumulate on-site. 2. Rubbish and debris shall be removed from the property daily, unless otherwise directed, to prevent accumulation on the site. Materials that cannot be removed daily shall be temporarily stored in areas approved by the Owner, and promptly removed thereafter. 3. Remove and transport debris in a manner that will prevent spillage on adjacent surfaces and areas. 4. Remove debris from elevated portions of building by chute, hoist, or other device that will convey debris to grade level in a controlled descent. 5. Comply with requirements specified in Section 017419 "Construction Waste Management and Disposal." 6. All disposal shall conform to Federal, State, and Local requirements, including the most current edition of the State of Michigan Administrative Circular No. 36A.

B. Burning: Do not burn demolished materials.

C. Clean adjacent structures and improvements of dust, dirt, and debris caused by selective demolition operations. Return adjacent areas to condition existing before selective demolition operations began.

END OF SECTION 024119

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SECTION 04 06 50

MORTAR AND MASONRY GROUT

PART 1 GENERAL

1.01 SECTION INCLUDES A. Mortar for masonry – new construction. B. Grout for masonry – new construction. C. Repointing mortar joints- at locations identified at walkthrough with Architect after building cleaning and prior to commencing work of this section. Comply with US Dept. of Interiors- National Park Service Historic Preservation Brief #2 “Repointing Mortar Joints in Historic Masonry Buildings”.

1.02 RELATED SECTIONS A. Section 048100 - Unit Masonry Assemblies: Installation of mortar and grout. B. Section 042110 – Veneer Masonry Units: Installation of mortar and grout. C. Section 081113 – Metal Doors and Frames: Grouting steel door frames.

1.03 REFERENCES A. ACI 530/ASCE 5/TMS 402 - Building Code Requirements For Masonry Structures; ACI International/American Concrete Institute. B. ACI 530.1/ASCE 6/TMS 602 - Specifications for Masonry Structures; ACI International/American Concrete Institute. C. ASTM C 94 - Standard Specification for Ready-Mixed Concrete. D. ASTM C 150 - Standard Specification for Portland Cement. E. ASTM C 270 - Standard Specification for Mortar for Unit Masonry. F. ASTM C 387 - Standard Specification for Packaged, Dry, Combined Materials for Mortar and Concrete. G. ASTM C 404 - Standard Specification for Aggregates for Masonry Grout. H. ASTM C 476 - Standard Specification for Grout for Masonry. I. ASTM C 780 - Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry J. ASTM C 1019 - Standard Method of Sampling and Testing Grout. K. ASTM C 1142 - Standard Specification for Extended Life Mortar for Unit Masonry. L. IMIAWC (CW) - Cold Weather Masonry Construction Guide -- Specifications and recommended Practices; International Masonry Industry All-Weather Council. M. IMIAWC (HW) - Recommended Practices and Guide Specifications for Hot Weather Masonry Construction.

1.04 DEFINITIONS A. Match Existing: New item or repair shall match the original historic undamaged component exactly in finished dimensions, profile, shape, texture, color and configuration. Use of off-the- shelf or standard components, profiles, colors, and sizes which are similar to existing, but do not match, is not permitted. Mock-up samples are to be reviewed and approved by architect prior to work done.

1.05 SUBMITTALS A. See Division 1, for submittal procedures. B. Product Data: Include design mix and indicate whether the Proportion or Property specification of ASTM C 270 is to be used. Also include required environmental conditions and admixture limitations. C. Samples: Submit two samples of mortar, illustrating mortar color and color range. D. Reports: Submit reports on mortar indicating conformance of mortar to property requirements of ASTM C 270 and test and evaluation reports per ASTM C 780.

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E. Reports: Submit reports on grout indicating conformance of component grout materials to requirements of ASTM C 476 and test and evaluation reports to ASTM C 1019. F. Manufacturer's Certificate: Certify that products meet or exceed specified requirements. G. Manufacturer's Instructions: Submit packaged dry mortar manufacturer's installation instructions. H. Qualification Data: Work must be performed by a firm having not less than five (5) years successful experience in comparable masonry projects including restoration and employing personnel skilled in the restoration processes and operations indicated.

1.06 QUALITY ASSURANCE A. Comply with provisions of ACI 530/ASCE 5/TMS 402 and ACI 530.1/ASCE 6/TMS 602, except where exceeded by requirements of the contract documents. 1. Maintain one copy of each document on project site.

1.07 DELIVERY, STORAGE, AND HANDLING A. Maintain packaged materials clean, dry, and protected against dampness, freezing, and foreign matter.

1.08 ENVIRONMENTAL REQUIREMENTS A. Cold Weather Requirements: Comply with IMIAWC (CW). B. Hot Weather Requirements: Comply with IMIAWC (HW).

PART 2 PRODUCTS

2.01 MATERIALS: NEW MASONRY CONSTRUCTION A. Mortar for New Masonry Construction: 1. Portland Cement-Lime Mix: Packaged blend of portland cement and hydrated lime containing no other ingredients. 2. Masonry Cement: ASTM C91/C91M. 3. Mortar Cement: ASTM C1329/C1329M. B. Color: 1. Exterior: Match existing mortar color. To be selected from manufacturers full range of color options. 2. Interior-standard units: Match existing mortar color. To be selected from manufacturers full range of color options. C. Portland Cement: ASTM C 150, Type I - Normal; match existing color. 1. Used for grouting requirements. D. Hydrated Lime: ASTM C207, Type S E Portland Cement-Lime Mix: Packaged blend of portland cement and hydrated lime containing no other ingredients F. Packaged Dry Mortar: ASTM C 387, Type N, using existing color cement. G. Grout Aggregate: ASTM C 404. H. Water: Clean and potable. I. Accelerating Admixture: Nonchloride type for use in cold weather. 1. Substitutions: See Section 01600 - Product Requirements. J. Moisture-Resistant Admixture: Water repellent compound designed to reduce capillarity. 1. Substitutions: See Section 01 60 00 - Product Requirements.

2.02 MATERIALS: POINTING MORTAR FOR EXISTING MASONRY A. Pointing Mortar for Existing Masonry and Existing Stone or Cast Stone features: 1. Historic Mix: 6 parts sand + 3 parts lime + 1 parts Portland cement. In all cases, the compressive strength of the restoration mortar shall be less than that of the brick, granite, stone or terra cotta. Third party testing of the brick composition and properties and existing mortar composition is required to verify specific mortar mix to prevent future damage to the

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masonry systems. Reports and results are to be submitted to the architect at least 30 days prior to any new work. 2. Mortar Components: a. Sand shall conform to ASTM C-144, with appropriate size and color to match existing. b. Lime shall conform to ASTM C-207, Type S, Hydrated Lime for masonry purposes. The use of quicklime is not recommended. c. Cement shall conform to ASTM C-150 Type II white Portland cement. This should not contain more than .60 percent alkali (to prevent efflorescence). 3. Add mortar pigments to produce mortar colors required to match existing areas where repairs and tuck-pointing occurs. 4. For pointing mortar, provide sand with rounded edges. 5. Mortar mix, color, and joint size are critical historic issues. The mortar mix described herin is not to be modified without authorization from the Architect. Mortar color and texture, joint size and tooling are to match original, and specific to the areas of work being done (as some areas may have different colors of materials from other areas).

2.03 MORTAR MIXES A. General: Do not use admixtures unless indicated as acceptable in the contract documents. 1. Do not use calcium chloride in mortar or grout mixture B. General: Do not use admixtures unless indicated as acceptable in the contract documents. 1. Do not use calcium chloride in mortar or grout mixture. C. Mixing: Use mechanical batch mixer and comply with referenced ASTM standards. D. Mortar for Unit Masonry: 1. Comply with ASTM C270, Proportion or Property Specification. Provide the following types of mortar for applications stated unless another type is indicated. 2. Reinforced masonry: Type S portland cement-lime or mortar cement only. a. Back-up block wythe of exterior wall (cavity and non-cavity types) construction. b. Single wythe exterior wall construction. 3. Type N Mortar: a. Exterior veneer wythe of exterior wall (cavity and non-cavity types) constructions. b. Interior masonry walls. E. Grout: ASTM C 476; provide consistency required at time of placement to fill completely all spaces indicated to be grouted. 1. Use coarse grout throughout - with no lime added. 2. Minimum compressive strength required of as indicated at 28 days. F. Ready Mixed Mortar: ASTM C 1142, Type RM. G. Mortar Mixes for repointing: Measure cementitious materials and sand in a dry condition by volume or equivalent weight. Mix materials in a clean, mechanical batch mixer. 1. Mixing Pointing Mortar: Thoroughly mix cementitious materials and sand together before adding any water. Then mix again adding only enough water to produce a damp, unworkable mix that will retain its form when pressed into a ball. Maintain mortar in this dampened condition for 15 to 30 minutes. Add remaining water in small portions until mortar reaches desired consistency. Use mortar within one hour of final mixing; do not re-temper or use partially hardened material. 2. Mortar Pigments: Do not exceed a pigment-to-cement ratio of 1:10 by weight. 3. Pointing Mortar for Brick: Mortar proportions are to be priced out as identified in mortar analysis. Mortar analysis is to be conducted by Soils and Materials Engineers of Grand Rapids, MI, or other qualified testing agency and information on exact mortar mix is to be by the contractor at least 30 days prior to any work. 4. Mortar color and texture, joint size and tooling are to match original.

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G. Stain Resistant Pointing Mortar: One part Portland cement, 1/8 part hydrated lime, and two parts graded (80 mesh) aggregate, proportioned by volume. Add aluminum tristearate, calcium stearate, or ammonium stearate equal to 2 percent of Portland cement by weight. H. Mortar Additive (for cold weather construction): Non-chloride accelerator for mortar applications. 1. Use of one of the following products is approved: a. "Accelguard 80"; The Euclid Chemical Co. b. "Morset"; W.R. Grace & Co./Masonry Products Division. 2. For use in masonry mortar when air temperature falls between 40 degrees F and 2 degrees F. 3. Material shall be used in accordance with published instructions of the manufacturer and Chapter 5 of ACI 531-79 guidelines. 4. Cold weather protection procedures must still be followed for a minimum of 2 hours following block installation.

2.04 MORTAR MIXING A. Thoroughly mix mortar ingredients using mechanical batch mixer, in accordance with ASTM C 270 and in quantities needed for immediate use. B. Maintain sand uniformly damp immediately before the mixing process. C. Do not use anti-freeze compounds to lower the freezing point of mortar. D. If water is lost by evaporation, re-temper only within two hours of mixing. E. Use mortar within two hours after mixing at temperatures of 90 degrees F, or two-and-one-half hours at temperatures under 40 degrees F.

2.05 GROUT MIXES A. Bond Beams and Lintels: See plans for strength at 28 days; 8-10 inches slump; mix in accordance with ASTM C 476. 1. Fine grout for spaces with smallest horizontal dimension of 2 inches or less. 2. Coarse grout for spaces with smallest horizontal dimension greater than 2 inches. B. Engineered Masonry: 3,000 psi strength at 28 days; 8-10 inches slump; provide premixed type in accordance with ASTM C 94. 1. Fine grout for spaces with smallest horizontal dimension of 2 inches or less. 2. Coarse grout for spaces with smallest horizontal dimension greater than 2 inches.

2.06 GROUT MIXING A. Mix grout in accordance with ASTM C 94. B. Thoroughly mix grout ingredients in quantities needed for immediate use in accordance with ASTM C 476 for fine grout. C. Add admixtures in accordance with manufacturer's instructions; mix uniformly. D. Do not use anti-freeze compounds to lower the freezing point of grout.

2.07 PRECONSTRUCTION TESTING A. Testing will be conducted by an independent test agency, in accordance with provisions of Section 01400. B. Mortar Mixes: Test mortars pre-batched by weight in accordance with ASTM C 780 recommendations for pre-construction testing. 1. Test results will be used to establish optimum mortar proportions and establish quality control values for construction testing. C. Grout Mixes: Test grout batches in accordance with ASTM C 1019 procedures. 1. Test results will be used to establish optimum grout proportions and establish quality control values for construction testing.

PART 3 EXECUTION

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3.01 PREPARATION A. Apply bonding agent to existing concrete surfaces. B. Plug clean-out holes for grouted masonry with brick masonry units. Brace masonry to resist wet grout pressure.

3.02 INSTALLATION A. Install mortar and grout to requirements of Section 04810. B. Work grout into masonry cores and cavities to eliminate voids. C. Do not install grout in lifts greater than 16 inches without consolidating grout by rodding. D. Do not displace reinforcement while placing grout. E. Remove excess mortar from grout spaces.

3.03 GROUTING A. Use either high-lift or low-lift grouting techniques, at Contractor 's option, subject to other limitations of contract documents. B. Perform all grouting by means of low-lift technique. Do not employ high-lift grouting. C. Perform grouting by means of high-lift technique, except in locations that mandate use of low- lift grouting technique. 1. Do not use high-lift grouting where size of cavities mandates use of fine grout. D. Low-Lift Grouting: 1. Limit height of pours to 12 inches. 2. Limit height of masonry to 16 inches above each pour. 3. Pour grout only after vertical reinforcing is in place; place horizontal reinforcing as grout is poured. Prevent displacement of bars as grout is poured. 4. Place grout for each pour continuously and consolidate immediately; do not interrupt pours for more than 1-1/2 hours. E. High-Lift Grouting: 1. Verify that horizontal and vertical reinforcement is in proper position and adequately secured before beginning pours. 2. Brick: Limit pours to maximum 12 feet in height and 25 feet horizontally. 3. Hollow Masonry: Limit lifts to maximum 4 feet and pours to maximum height of 24 feet. 4. Place grout for spanning elements in single, continuous pour.

3.04 FIELD QUALITY CONTROL A. An independent testing agency will perform field tests. B. Test and evaluate mortar in accordance with ASTM C 780 procedures. 1. Test with same frequency as specified for masonry units. C. Test and evaluate grout in accordance with ASTM C 1019 procedures. 1. Test with same frequency as specified for masonry units.

3.5 SCHEDULES A. Exterior grout selection will be determined upon completion of exterior building cleaning.

END OF SECTION 04 06 50

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SECTION 04 21 00

VENEER MASONRY UNITS

PART 1 GENERAL

1.01 SECTION INCLUDES A. Salvage Face Brick B. New Face Brick. C. Limestone. D. Reinforcement and Anchorage. E. Flashings. F. Accessories. G. Security Key Box. H. Repairing unit masonry, including replacing damaged units at locations identified at walkthrough with Architect after building cleaning and prior to commencing work of this section. I. Removing plant growth. J. Cleaning exposed masonry surfaces. Comply with US Dept. of Interiors-National Park Service- Historic Preservation Brief #1 “Assessing, Cleaning, and Water Repellant Treatment for Historic Masonry Buildings”.

1.02 RELATED SECTIONS A. Section 04 06 50 - Mortar and Masonry Grout. B. Section 04 72 00 - Cast Stone C. Section 04 81 00 - Unit Masonry Assemblies. D. Section 05 50 00 - Metal Fabrications: Loose steel lintels. E. Section 06 10 00 - Rough Carpentry: Nailing strips built into masonry. F. Section 07 21 00 – Board and Batt insulation – Cavity Wall Insulation. G. Section 07 84 00 - Firestopping: Firestopping at penetrations of masonry work. H. Section 07 92 00 - Joint Protection: Backing rod and sealant at control and expansion joints.

1.03 REFERENCES A. ACI 530/ASCE 5/TMS 402 - Building Code Requirements for Masonry Structures; American Concrete Institute International; 2005. B. ACI 530.1/ASCE 6/TMS 602 - Specification For Masonry Structures; American Concrete Institute International; 2005. C. ASTM A 82 - Standard Specification for Steel Wire, Plain, for Concrete Reinforcement; 2002. D. ASTM A 153/A 153M - Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware; 2004. E. ASTM A 615/A 615M - Standard Specification for Deformed and Plain Billet-Steel Bars for Concrete Reinforcement; 2004b. F. ASTM A 653/A 653M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process; 2004a. G. ASTM C 67 - Standard Test Methods for Sampling and Testing Brick and Structural Clay Tile; 2003a.

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H. ASTM C 140 - Standard Test Methods of Sampling and Testing Concrete Masonry Units and Related Units; 2003. I. ASTM C 216 - Standard Specification for Facing Brick (Solid Masonry Units Made From Clay or Shale); 2004b. J. ASTM C 780 - Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry; 2002. K. ASTM D 1970 - Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection; 2001. L. IMIAWC (CW) - Recommended Practices & Guide Specifications for Cold Weather Masonry Construction; International Masonry Industry All-Weather Council; 1993. M. IMIAWC (HW) - Recommended Practices & Guide Specifications for Hot Weather Masonry Construction; International Masonry Industry All-Weather Council; current edition.

1.04 DEFINITIONS A. Match Existing: New item or repair shall match the original existing undamaged component exactly in finished dimensions, profile, shape, texture, color and configuration. Use of off-the- shelf or standard components, profiles, colors, and sizes which are similar to existing, but do not match, is not permitted. Mock-up samples are to be reviewed and approved by architect prior to work done. B. Low-Pressure Spray: 50 to 80 psi; 2 to 4 gpm.

1.05 SUBMITTALS A. See Division 1 for submittal procedures. B. Product Data: Provide data for fabricated wire reinforcement, masonry accessories, and facing brick. C. Samples: Submit four samples of facing brick units to illustrate color, texture, and extremes of color range. D. Manufacturer's Certificate: Certify that products meet or exceed specified requirements. E. Qualification Data: Work must be performed by a firm having not less than five (5) years successful experience in comparable masonry projects including restoration and employing personnel skilled in the restoration processes and operations indicated.

1.06 QUALITY ASSURANCE A. Comply with provisions of ACI 530/ASCE 5/TMS 402 and ACI 530.1/ASCE 6/TMS 602, except where exceeded by requirements of the contract documents. B. Manufacturer's Qualifications: Company specializing in manufacturing the products specified in this section with five years of documented experience. C. Salvaged Existing Brick: Engage a qualified independent testing agency to site test existing salvaged brick. Test according to ASTM C 67 for compressive strength, 24-hour cold-water absorption, 5-hour boil absorption, saturation coefficient, and initial rate of absorption (suction). Tests to be performed on salvaged brick prior to reinstallation. a. Test reports shall delineate the following criteria with associated results meeting minimum and maximum values as stipulated below: 1) Efflorescence Rating: “No Efflorescence” 2) Minimum Compression Strengths (SW): a) Individual Brick: 2000 psi b) Average of 5 brick: 3000 psi

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3) Maximum Water Absorptions: a) 5 Hour Boil: 1) Individual brick: 20.0% 2) Average of 5 brick: 17.0% 4) Maximum Saturation Coefficients: a) Individual Brick: .80 (waivers not allowed) b) Average of 5 brick: .78 (waivers not allowed) The Owner may choose to approve a brick that does not comply with the maximum saturation coefficients above but complies with ASTM C-216's “absorptive alternate”. The sample brick must meet the compressive strength requirements listed above and any of the five samples used for the 24 hr. cold water submersion test does not have the absorption exceeding eight (8%) percent by weight. The Owner has the sole discretion to accept brick based on the bricks performance according to this alternate standard. If the Owner, in its sole discretion, rejects a brick based upon this “absorption alternate” the brick proposed MUST meet the ASTM criteria outlined in Section 04 01 20 (1.4,1, a, 1 through 4). 5) Maximum Permitted Initial Rate of Absorption: a) 30 grams/min/30si tested in accordance with ASTM C-67.

D. Submit initial test report submittal from the brick manufacturer. Test report must be for the product manufactured in the most recent 12-month period. Supplied by Manufacturer.

E. Final test report submittal for actual product manufactured for specific project. Supplied by Manufacturer.

F. All brick provided and installed for the project shall be free of efflorescence.

G. Masonry units, upon delivery to the project site, shall not be stored in direct contact with the ground.

H. Required test data shall be submitted and approved by the Architect and the Owner before brick is delivered.

1.07 MOCK-UP A. Construct a masonry wall as a mock-up panel minimum sized 12 feet wide by 4 feet high: 4’ of each type of decorative concrete veneer, 4’ of each type of brick; on concrete masonry unit backup, which includes mortar, anchors, accessories, and flashing. B. Locate where directed. 1.08 PRE-INSTALLATION MEETING A. Convene one week before starting work of this section. 1.09 DELIVERY, STORAGE, AND HANDLING A. Deliver, handle, and store masonry units by means that will prevent mechanical damage and contamination by other materials.

1.10 ENVIRONMENTAL REQUIREMENTS A. Cold and Hot Weather Requirements: Comply with requirements of ACI 530.1/ASCE 6/TMS 602 or applicable building code, whichever is more stringent. B. Cold Weather Requirements: Comply with recommendations of IMIAWC (CW).

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C. Hot Weather Requirements: Comply with IMIAWC (HW).

PART 2 - PRODUCTS 2.01 SALVAGED BRICK A. Inspect all salvaged brick to be re-used. B. Discard any salvaged brick units that are cracked, spalled, or otherwise structurally unsound.

2.02 NEW BRICK UNITS A. Facing Brick: at bumpout locations: 1. See 2.03 below. B. Facing Brick: at Area A to Area B connection, and at Nursing end wall: ASTM C 216, Type FBA, Grade SW. 1. Color: Color as selected by Architect from manufacturer’s full range of colors 2. Size: Nominal 3”x4”x16” and Nominal 4”x4”x16” 3. Texture: Smooth 4. Basis of Design: Abri Traditions by Concrete Products Group C. Facing Brick: Masonry Base: ASTM C 216, Type FBA, Grade SW. 1. Color: Color as selected by Architect from manufacturer’s full range of colors 2. Size: per drawings 3. Texture: Ground, filled, and polished 4. Basis of Design: Trendstone Plus filled and polished masonry units by Echelon Masonry

2.03 NEW BRICK UNITS TO MATCH EXISTING A. Provide face brick and accessories, including specially molded, ground, cut, or sawed shaped.

a. Facing Brick: ASTM C 216, Type FBA, Grade SW. b. Provide units with colors, surface texture, size, and shape to match existing brickwork and with physical properties not less than those of selected existing units. c. New Brick units to match Existing: 1) Color: To be determined from salvaged brick samples 2) Size: To be determined from salvaged brick samples 3) Hand cut each brick on wet saw to create matching size of original. Tumbled edges if required to match existing. d. Mock up to be approved by Owner and Architect utilizing mix as specified prior to ordering brick. B. Building Brick: ASTM C 62; Grade SW, MW, or NW, except Grade SW where in contact with earth; of same vertical dimension as face brick; for masonry work concealed from view. C. Water: Potable, free of oils, acids, alkalis and organic matter.

2.04 CLEANING MATERIALS A. Water for Cleaning: Potable, free of oils, acids, alkalis, salts and organic matter. B. Environmental Protection System: Use a dry absorbent compound for spillage and to dike/contain and collect wash off residue for safer disposal and to address local environmental requirements. C. General Cleaner: Manufacturer's standard masonry restoration cleaner composed of detergents, wetting agents, and inhibitors.

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Refer to: US Dept. of Interiors –National Park Service Historic Preservation Brief #1 “Assessing, Cleaning, and Water Repellent Treatments for Historic Masonry Buildings”, and Brief #2 “Repointing Mortar Joints in Historic Masonry Buildings”. 1. Products: a. Diedrich Technologies, Inc.: 101G Masonry Restorer b. Price Research, Ltd.; Price Restoration Cleaner c. Prosoco; Sure Klean 1028 Restoration Cleaner

D. Cleaner for existing masonry to receive new masonry stain: 1. Low-pressure spray existing masonry to remove existing surface staining and debris. 2. Products: a. If penetrating silicone sealer is present on surface of existing masonry, clean surface with Prosoco Sure Klean Dicone NC9 b. If a film building sealer product is present on surface of existing masonry, strip surface with Prosoco Fast acting Stripper or Prosoco Safestrip E. Masonry Patching Compound: Factory-mixed cementitious product that is custom manufactured for patching masonry, is vapor- and water permeable, exhibits low shrinkage, and develops high bond strength to all types of masonry. 1. Formulate patching compound to match masonry units being patched. 2. Products: a. Cathedral Stone Products, Inc.; Jahn Restoration Mortar. b. Edison Coatings, Inc.; Custom System 45. F. Liquid Strippable Masking Agent: Manufacturer's standard liquid, film-forming, strippable masking material for protecting glass, metal, and polished stone surfaces from damaging effects of acidic and alkaline masonry cleaners. 1. Products: a. American Building Restoration Products, Inc.; LM 130 Acid Shield. b. Diedrich Technologies Inc.; Diedrich Acid Guard. c. Price Research, Ltd.; Price Mask. d. Prosoco; Sure Klean Strippable Masking.

2.03 REINFORCEMENT AND ANCHORAGE A. Manufacturers of Joint Reinforcement and Anchors: 1. Dur-O-Wal: www.dur-o-wal.com. 2. Hohmann & Barnard, Inc: www.h-b.com. 3. Masonry Reinforcing Corporation of America: www.wirebond.com. 4. Substitutions: See Section 01 60 00 - Product Requirements. B. Flexible Anchors: 2-piece anchors permitting vertical differential movement between masonry and structural frame but preventing lateral movement of masonry out of plane. 1. For concrete framework, provide dovetail anchor sections formed from 12 gage sheet metal, and triangular wire ties 0.1875 inch thick; size ties to fall no more than 1 inch short of masonry face. a. Furnish dovetail slots of sizes indicated, with filler strips, fabricated from not less than 22 gage sheet metal, for installation under Division 3.

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2. For steel framework, provide crimped wire anchor section 0.25 inch thick for welding and triangular wire tie 0.1875 inch thick; size ties to fall no more than 1 inch short of masonry face. 3. Materials: a. Hot-Dip Galvanized, Carbon-Steel Wire: ASTM A 82; with ASTM A 153/A 153M, Class B-2 coating. b. Steel Sheet, Galvanized after Fabrication: ASTM A 1008/A 1008M, Commercial Steel, hot-dip galvanized after fabrication to comply with ASTM A 153/A 153M. c. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M. C. Adjustable Masonry Veneer Anchors: 2-piece anchors permitting vertical or horizontal differential movement between masonry veneer and structural frame but preventing lateral movement of masonry out of plane and resisting tensile and compressive forces perpendicular to wall. 1. For adjustable wire ties connecting brick veneer to CMU backup, provide .1875 inch diameter eyes welded to side rods and cross rods specified above, and .1875 inch triangular tab-type pintles. Size ties to fall no more than 1” short of masonry face each side of wall. a. At exterior walls, verify selection vs. enlarged cavity size indicated on drawings. b. Ties shall have at least two .1875 inch diameter pintle legs in conformance with ACI 530. 2. For adjustable wire ties connecting brick veneer to metal stud backup, provide product equal to Hohmann & Barnard, Inc. DW-10 Series Veneer Anchors. . a. Size wire ties to fall no more than 1” short of masonry face. Verify selection vs. cavity size indicated on drawings. b. Minimum screw diameter 0.190" c. Minimum base thickness of 0.043" 3. Materials: a. Cold-drawn steel wire conforming to ASTM A 82: Hot-dip galvanized after fabrication; with ASTM A 153/A 153M b. Steel sheet conforming to ASTM A 366, Hot-dip galvanized after fabrication: ASTM A 153/A 153M Class B D. Wire Ties, General: Unless otherwise indicated, size wire ties to extend at least halfway through veneer but with at least 5/8-inch (16-mm) cover on outside face. Outer ends of wires are bent 90 degrees and extend 2 inches (50 mm) parallel to face of veneer. 1. Individual Wire Ties: Rectangular units with closed ends and not less than 4 inches (100 mm) wide. a. Wire: Fabricate from 3/16-inch (4.8-mm) diameter, hot-dip galvanized steel wire. E. Adjustable Anchors for Connecting Directly to Steel Structure: Provide anchors that allow vertical or horizontal adjustment but resist tension and compression forces perpendicular to plane of wall. 1. Anchor Section for Welding to Steel Frame: Crimped 1/4-inch- (6.4-mm-) diameter, hot-dip galvanized steel wire. 2. Tie Section: Triangular-shaped wire tie, sized to extend within 1 inch (25 mm) of masonry face, made from 0.188-inch (4.8-mm) diameter, hot-dip galvanized steel wire. F. Stainless Steel Strap Anchors: Stainless Steel bent shapes configured as required for specific situations, 1-1/4” width, 0.105 in thick, lengths as required to provide not more than 1 inch and not less than 1/2 inch of mortar coverage from masonry face, corrugated for embedment in masonry joint, hot dip galvanized to ASTM A 153/A 153M, Class B. G. Wall Ties: Corrugated formed sheet metal, 7/8 inch wide by 0.05 inch thick, hot dip galvanized to ASTM A 153/A 153M, Class B, sized to provide not more than 1 inch and not less than 1/2 inch of mortar coverage from masonry face.

2.04 FLASHINGS A. Rubberized Asphalt Flashing: Self-adhering polymer-modified asphalt sheet complying with ASTM D 1970; minimum 0.030 inch total thickness; with cross-linked polyethylene top and bottom surfaces. Seal to drip plate where drip plate conditions occure.

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A. Drip Plate: Type 304 stainless steel 26 gauge: ASTM A240, ASTM A666 ASTM A480, ASTM A167. See drawings for locations. Basis-of-Design: Hohmann & Barnard, Inc. DP and DP- LB (for lip brick conditions). C. Galvanized Steel: ASTM A 653/A 653M, with G90/Z275 coating, 24 gage total thickness. D. Lap Sealant: Butyl type as specified in Section 07 90 00.

2.05 ACCESSORIES A. Preformed Control Joints: Neoprene material. Provide with corner and tee accessories, fused joints. B. Joint Filler: Closed cell neoprene; oversized 50 percent to joint width; self expanding; 4 inch wide x by maximum lengths available, unless noted otherwise. C. Cavity Mortar Control: Semi-rigid polyethylene or polyester mesh panels, sized to thickness of wall cavity, and designed to prevent mortar droppings from clogging weeps and cavity vents and allow proper cavity drainage. 1. Mortar Diverter: Panels designed for installation at flashing locations. a. Manufacturers: 1) Mortar Net USA, Ltd; Product "Mortar Net Drainage System": www.mortarnet.com. 2) Substitutions: See Section 01600 - Product Requirements. D. Weeps: Full head joint weep. Basis-of-Design: Hohmann & Barnard, Inc. #QV – Quadro-Vent, gray E. Nailing Strips: Preservative treated softwood, as specified in Section 06 10 00. F. Cleaning Solution: Non-acidic, not harmful to masonry work or adjacent materials. G. Reglets: Recessed two piece type, 26 gage galvanized steel; Type B Snap-Lock, Masonry Reglet manufactured by Cheney Flashing Company or Architect approved substitution. 1. Install first component into mortar joint, provide counter-flashing component to roofing contractor for installation as part of roof work.

2.06 SECURITY KEY BOX A. High security key box as manufactured by Knox®: www.knoxbox.com B. Model: Knox-Box 3200 Series Hinged Door Model, recess mount C. Finish: As selected by Architect – provide samples for approval D. Placement: as indicated on drawings E. Install per manufacturer’s recommendation – provide accessory material and anchorage as required.

PART 3 - EXECUTION

3.01 EXAMINATION A. Verify that field conditions are acceptable and are ready to receive masonry. B. Verify that related items provided under other sections are properly sized and located. C. Verify that built-in items are in proper location, and ready for roughing into masonry work.

3.02 PREPARATION A. Direct and coordinate placement of metal anchors supplied for installation under other sections. B. Provide temporary bracing during installation of masonry work. Maintain in place until building structure provides permanent bracing. C. Carefully remove and store fixtures, fittings, finishing hardware, accessories. D. Close off areas, landscaping, materials, and surfaces not receiving work of this section to protect from damage. E. Construct dust proof partitions to close off occupied areas.

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F. Protect elements surrounding the work of this section from damage and disfigurement. G. Immediately remove stains, efflorescence, or other excess resulting from the work of this section. H. Protect roof membrane and flashings from damage. Lay 1/2 inch plywood on roof surfaces over full extent of work area and traffic route. I. Protect doors, windows, hardware, woodwork, metalwork and other construction in place from cleaning agents. J. Provide sand dams to divert flowing water to exterior. K. Do not perform work in in-climate weather or high wind conditions

3.03 PROTECTION A. Protect persons, motor vehicles, surrounding surfaces of building being restored, building site, plants, and surrounding buildings from harm resulting from masonry restoration work. B. Prevent chemical cleaning solutions from coming into contact with pedestrians, motor vehicles, landscaping, buildings, and other surfaces that could be harmed by such contact. 1. Cover adjacent surfaces with materials that resist chemical cleaners used unless chemical cleaners will not damage surfaces. Use materials that contain only waterproof, UV-resistant adhesives. When no longer needed, promptly remove masking to prevent adhesive staining. 2. Keep wall wet below area being cleaned to prevent streaking from runoff.

3.04 MASONRY REMOVAL, REPLACEMENT, AND PATCHING C. At locations indicated or field determined by architect, remove masonry units that are damaged, spalled, or deteriorated. Carefully demolish or remove entire units from joint to joint, without damaging surrounding masonry, in a manner that permits replacement with full-size units. D. Support and protect remaining masonry that surrounds removal area. Maintain flashing, reinforcement, lintels, and adjoining construction in an undamaged condition. E. Remove in an undamaged condition as many whole bricks as possible. 1. Remove mortar, loose particles, and soil from brick by cleaning with hand chisels, brushes, and water. F. Clean bricks surrounding removal areas by removing mortar, dust, and loose particles. G. Brick Replacement: 1. Install replacement brick into bonding and coursing pattern of existing brick. If cutting is required, use a motor-driven saw to cut masonry with clean, sharp, unchipped edges. Tumble edges if required to match adjacent materials. 2. Lay brick with completely filled bed, head, and collar joints. Butter ends with sufficient mortar to fill head joints and shove into place. Wet both replacement and surrounding bricks that have ASTM C 67 initial rates of absorption (suction) of more than 30 g/30 sq. in. per min. Maintain joint width to match existing joints. a. Exposed mortar joints to match joints of surrounding existing brickwork. b. Refer to structural for additional requirements and materials required for anchoring new brickwork to existing conditions.

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3.05 REBUILDING A. Cut out damaged and deteriorated masonry with care in a manner to prevent damage to any adjacent remaining materials. B. Support structure as necessary in advance of cutting out units. C. Cut away loose or unsound adjoining masonry as directed, and as required for stabilizing construction. D. Build in new units following procedures for new work specified in Division 4. E. Mortar Mix: Colored and proportioned to match existing work. See Mock-up instructions. F. Ensure that anchors are correctly located and built in. G. Install built in masonry work to match and align with existing, with joints and coursing true and level, faces plumb and in line. Build in all openings, accessories and fittings. H. Establish high priority areas for reuse of salvaged brick and other areas for use of new brick units, so that appearance is consistent with historical precedent. Confirm locations with architect prior to installation. I. Re-build is to utilize tooth-in methods with no exposed cut sides. 3.06 REPOINTING MASONRY J. Rake out and repoint mortar joints as follows: 1. Remove mortar from joints to depth of 2-1/2 times joint width, but not less than 1/2 inch or not less than that required to expose sound, unweathered mortar. Remove mortar from masonry surfaces within raked-out joints to provide reveals with square backs and to expose masonry for contact with pointing mortar. 2. Cut out mortar by hand with chisel and mallet. 3. Use power tools only after test cuts determine no damage to masonry units will result. - Do not damage masonry units. 4. Cut out center of mortar bed joints using angle grinders with diamond-impregnated metal blades. Do not spall edges of brick units or wide joints. Remove remaining mortar by hand with chisel and mallet. Strictly adhere to written quality-control program. Quality- control program shall include provisions for demonstrating ability of operators to use tools without damaging masonry, supervising performance, and preventing damage due to worker fatigue. 5. When cutting is complete, remove dust and loose material by brushing. 6. Rinse masonry-joint surfaces with water to remove dust and mortar particles. Time rinsing application so, at time of pointing, joint surfaces are damp but free of standing water. If rinse water dries, dampen masonry-joint surfaces before pointing. 7. Install restoration masonry anchors, as required prior to pointing mortar. 8. Pre-moisten joint and bricks and apply mortar specified in Division 4. Pack tightly in maximum 1/4 inch layers. Form a smooth, compact tooled joint to match existing profile. 9. Apply pointing mortar first to areas where existing mortar was removed to depths greater than surrounding areas. Apply in layers not greater than 3/8 inch. Fully compact each layer thoroughly and allow it to become thumbprint hard before applying next layer. Where existing bricks have worn or rounded edges, slightly recess finished mortar surface below face of masonry to avoid widened joint faces. 10. When mortar is thumbprint hard, tool joints to match original appearance of joints. Remove excess mortar from edge of joint by brushing.

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K. Cure mortar by maintaining in thoroughly damp condition for at least 72 hours including weekends and holidays. 1. Acceptable curing methods include covering with wet burlap and plastic sheeting, periodic hand misting, and periodic mist spraying using system of pipes, mist heads, and timers.

3.03 COURSING

A. Establish lines, levels, and coursing indicated. Protect from displacement. B. Maintain masonry courses to uniform dimension. Form vertical and horizontal joints of uniform thickness. C. Brick Units: 1. Bond: To match existing. 2. Coursing: Three units and three mortar joints to equal 8 inches. 3. Mortar Joints: To match existing. 4. Tooth-in salvaged brick to match existing.

3.04 PLACING AND BONDING

A. Lay solid masonry units in full bed of mortar, with full head joints, uniformly jointed with other work. B. Lay hollow masonry units with face shell bedding on head and bed joints. C. Buttering corners of joints or excessive furrowing of mortar joints is not permitted. D. Remove excess mortar and mortar smears as work progresses. E. Interlock intersections and external corners. F. Do not shift or tap masonry units after mortar has achieved initial set. Where adjustment must be made, remove mortar and replace. G. Perform job site cutting of masonry units with proper tools to provide straight, clean, unchipped edges. Prevent broken masonry unit corners or edges. H. Cut mortar joints flush where resilient base is scheduled. I. Isolate masonry partitions from vertical structural framing members with a control joint as indicated. J. Isolate top joint of masonry partitions from horizontal structural framing members and slabs or decks with compressible joint filler.

3.05 WEEP/CAVITY VENTS A. Install weeps in veneer walls at 24 inches on center horizontally above through-wall flashing. B. Install cavity mortar diverter at base of cavity and at other flashing locations as recommended by manufacturer to prevent mortar droppings from blocking weep/cavity vents.

3.06 CAVITY WALL A. Do not permit mortar to drop or accumulate into cavity air space or to plug weep/cavity vents. B. Install cavity mortar diverter at base of cavity and at other flashing locations as recommended by manufacturer to prevent mortar droppings from blocking weep/cavity vents.

3.07 ANCHORAGE - MASONRY VENEER A. Masonry Back-Up: Secure adjustable two-piece anchors veneer anchors to masonry back-up and embed anchors to bond veneer at a maximum 2.67 sq ft of wall surface per anchor with a

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maximum 16 inches on center vertically and 32 inches on center horizontally. Place additional anchors at perimeter of openings and ends of panels, so maximum spacing of anchors is 8 inches on center.

3.08 MASONRY FLASHINGS A. Whether or not specifically indicated, install masonry flashing to divert water to exterior at all locations where downward flow of water will be interrupted. 1. Extend flashings full width at such interruptions and at least 4 inches into adjacent masonry or turn up at least 4 inches to form watertight pan at non-masonry construction. 2. Remove or cover protrusions or sharp edges that could puncture flashings. 3. Seal lapped ends and penetrations of flashing before covering with mortar.

B. Extend metal flashings through exterior face of masonry and turn down to form drip. Install joint sealer below drip edge to prevent moisture migration under flashing.

C. Extend laminated and rubberized asphalt flashings to within 1/4 inch of exterior face of masonry.

D. Lap end joints of flashings at least 4 inches and seal watertight with mastic or elastic sealant.

E. Install first component of two piece reglet into mortar joint where indicated on the drawings.

3.09 LINTELS A. Install loose steel lintels over openings. B. Maintain minimum 8 inch bearing on each side of opening.

3.10 CONTROL AND EXPANSION JOINTS A. Form expansion joint as detailed, see Section 07 90 00.

3.11 BUILT-IN WORK A. As work progresses, install built-in metal door frames and other items to be built into the work and furnished under other sections.

B. Install built-in items plumb, level, and true to line. C. Bed anchors of metal door and glazed frames in adjacent mortar joints. Fill frame voids solid with grout. 1. Masonry cores with grout minimum 12 inches from framed openings.

D. Do not build into masonry construction organic materials that are subject to deterioration.

3.12 TOLERANCES

A. Maximum Variation from Alignment of Columns: 1/4 inch. B. Maximum Variation From Unit to Adjacent Unit: 1/16 inch. C. Maximum Variation from Plane of Wall: 1/4 inch in 10 ft and 1/2 inch in 20 ft or more. D. Maximum Variation from Plumb: 1/4 inch per story non-cumulative; 1/2 inch in two stories or more. E. Maximum Variation from Level Coursing: 1/8 inch in 3 ft and 1/4 inch in 10 ft; 1/2 inch in 30 ft. F. Maximum Variation of Joint Thickness: 1/8 inch in 3 ft. G. Maximum Variation from Cross Sectional Thickness of Walls: 1/4 inch.

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3.13 CUTTING AND FITTING A. Cut and fit for pipes, conduit, sleeves, and grounds. Coordinate with other sections of work to provide correct size, shape, and location.

B. Obtain approval prior to cutting or fitting masonry work not indicated or where appearance or strength of masonry work may be impaired.

3.14 FIELD QUALITY CONTROL A. An independent testing agency will perform field quality control tests, as specified in Section 01 40 00 – Quality Requirements.

B. Clay Masonry Unit Tests: Test each variety of clay masonry in accordance with ASTM C 67 requirements, sampling 5 randomly chosen units for each 50,000 installed.

C. Concrete Masonry Unit Tests: Test each variety of concrete unit masonry in accordance with ASTM C 140 for conformance to requirements of this specification.

D. Mortar Tests: Test each type of mortar in accordance with ASTM C 780, testing with same frequency as masonry samples.

3.15 CLEANING

A. The mason shall keep brick clean of excess mortar droppings, smears, and stains while laying brick. Dry brush clean or use clean water as necessary. B. Proceed with cleaning in an orderly manner; work from top to bottom of each scaffold width and from one end of each elevation to the other. C. Use only those cleaning methods indicated for each masonry material and location, as approved by the brick manufacturer. Such approval shall be obtained in writing and a copy provided to the Owner. 1. Do not use wire brushes. 2. Use spray equipment that provides controlled application at volume and pressure indicated, measured at spray tip. 3. For chemical cleaner spray application, use low-pressure tank or chemical pump suitable for chemical cleaner indicated, equipped with cone-shaped spray tip. 4. For water spray application, use fan-shaped spray tip that disperses water at an angle of 25 to 50 degrees. 5. No acid based cleaners shall be used. 6. Protect surrounding materials, equipment, plants, and other items. D. Removing Plant Growth: Completely remove plant, moss, and shrub growth from masonry surfaces. Carefully remove plants, creepers, and vegetation by cutting at roots and allowing to dry as long as possible before removal. Remove loose soil and debris from open masonry joints to whatever depth they occur. E. Chemical Cleaner Application Methods: Apply chemical cleaners to masonry surfaces to comply with chemical cleaner manufacturer's written instructions; use brush or spray application methods, at Contractor's option. Do not spray apply at pressures exceeding 80 psi. Do not allow chemicals to remain on surface for periods longer than those indicated or recommended by manufacturer.

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3.16 FINAL CLEANING A. After mortar has fully hardened, thoroughly clean exposed masonry surfaces of excess mortar and foreign matter; use wood scrapers, stiff-nylon or -fiber brushes, and clean water, spray applied at low pressure. 1. Do not use metal scrapers or brushes. 2. Do not use acidic or alkaline cleaners.

3.17 PROTECTION OF FINISHED WORK A. Without damaging completed work, provide protective boards at exposed external corners which are subject to damage by construction activities.

END OF SECTION 04 21 00

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SECTION 04 72 00 CAST STONE PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. 1.2 SUMMARY A. This Section includes the following: 1. Cast stone wall units. B. Related Sections include the following: 1. Division 4 - Unit Masonry Assemblies 1.3 DEFINITIONS A. Cast Stone: Architectural precast concrete building units intended to simulate natural cut stone. 1.4 SUBMITTALS A. Product Data: Include construction details, material descriptions, dimensions of individual components and profiles, and finishes for cast stone units. B. Shop Drawings: Show fabrication and installation details for cast stone units. Include dimensions; details of reinforcement and anchorages, and indication of finished faces. 1. Include building elevations showing layout of units and locations of joints and anchors. C. Samples: For each color and texture of cast stone required, 10 inches square in size. D. Samples for Initial Selection: For colored mortar, showing the full range of colors available. E. Samples for Verification: For each mortar color required, showing the full range expected in the finished construction. Make samples using the same sand and mortar ingredients to be used on Project. Label samples to indicate type and amount of colorant used. F. Full-Size Samples: For each type of cast stone unit required. Make available for Architect's review at Project site before installing cast stone. 1. Approved Samples may be installed in the Work. G. Qualification Data: For firms and persons specified in "Quality Assurance" Article to demonstrate their capabilities and experience. Include lists of completed projects with project names and addresses, names and addresses of architects and owners, and other information specified. 1. Include copies of material test reports for completed projects, indicating compliance of cast stone with ASTM C 1364. H. Material Test Reports: From a qualified testing agency indicating and interpreting test results for compliance of cast stone with requirements indicated. 1.5 QUALITY ASSURANCE A. Manufacturer Qualifications: A firm experienced in manufacturing cast stone units similar to those indicated for this Project and with a record of successful in-service performance, as well as sufficient production capacity to manufacture required units. B. Testing Agency Qualifications: An independent testing agency qualified according to ASTM E 329 to conduct the testing indicated, as documented according to ASTM E 548. Cast Stone 04 72 00 - 1 of 6 Alpena Community College Center for Health Sciences- Van Lare Hall Renovation 17.520 9/27/2019 Plan Review and Permit

C. Source Limitations for Cast Stone: Obtain cast stone units through one source from a single manufacturer. D. Source Limitations for Mortar Materials: Obtain mortar ingredients of a uniform quality, including color, from one manufacturer for each cementitious component and from one source or producer for each aggregate. 1.6 MOCK-UP A. Construct a mock-up panel as indicated on drawings, which includes mortar, accessories and structural back up. B. Locate where directed by the owner. 1.7 DELIVERY, STORAGE, AND HANDLING A. Pack, handle, and ship cast stone units in suitable packs or pallets. 1. Lift with wide-belt slings; do not use wire rope or ropes that might cause staining. Move cast stone units, if required, using dollies with wood supports. 2. Store cast stone units on wood skids or pallets with nonstaining, waterproof covers. Arrange to distribute weight evenly and to prevent damage to units. Ventilate under covers to prevent condensation. B. Store installation materials on elevated platforms, under cover, and in a dry location. C. Store mortar aggregates where grading and other required characteristics can be maintained and contamination avoided. 1.8 COORDINATION A. Coordinate production and delivery of cast stone with unit masonry work to minimize the need for on-site storage and to avoid delaying the Work.

PART 2 -PRODUCTS 2.1 MANUFACTURERS A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following: 1. Basis of Design: Superior Precast 2. Northfield Block Company 3. PrarieStone masonry units 4. Substitutions: See Section 01 60 00 – Product Requirements

2.2 CAST STONE MATERIALS A. General: Comply with ASTM C 1364 and the following: B. Portland Cement: ASTM C 150, Type I, containing not more than 0.60 percent total alkali when tested according to ASTM C 114. C. Coarse Aggregates: Granite, quartz, or limestone complying with ASTM C 33; gradation as needed to produce required textures. D. Fine Aggregates: Manufactured or natural sands complying with ASTM C 33, gradation as needed to produce required textures.

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E. Air-Entraining Admixture: ASTM C 260, certified by the manufacturer to be compatible with other admixtures used. 1. Add to mixes for units exposed to the exterior at manufacturer's prescribed rate to result in an air content of 5 to 7 percent. F. Reinforcement: Deformed steel bars complying with ASTM A 615/A 615M. 1. Epoxy Coating: ASTM A 775/A 775M. 2. Galvanized Coating: ASTM A 767/A 767M. G. Embedded Anchors and Other Inserts: Fabricated from stainless steel complying with ASTM A 276 or ASTM A 666, Type 304. H. Embedded Anchors and Other Inserts: Fabricated from steel complying with ASTM A 36/A 36M, and hot-dip galvanized to comply with ASTM A 123. 2.3 CAST STONE UNITS A. Provide cast stone units complying with ASTM C 1364. 1. Provide units that are resistant to freezing and thawing as determined by laboratory testing according to ASTM C 666, Procedure A, as modified by ASTM C 1364. B. Reinforce units as indicated and as required by ASTM C 1364. Use galvanized or epoxy-coated reinforcement when covered with less than 1-1/2 inches of material. C. Fabricate units with sharp corners and details accurately reproduced with indicated texture on all exposed surfaces, unless otherwise indicated. 1. Match existing profiles for cast stone units. 2. Slope exposed horizontal surfaces at least 1:12, unless otherwise indicated. 3. Provide raised fillets at backs of sills and at ends indicated to be built into jambs. 4. Provide drips on projecting elements, unless otherwise indicated. D. Cure and finish units as follows: 1. Cure units in totally enclosed curing room under dense fog and water spray at 95 percent relative humidity for 24 hours. 2. Yard cure units until the sum of the mean daily temperatures for each day equals or exceeds 350 deg F. 3. Acid etch units to remove cement film from surfaces indicated to be finished. E. Color and Texture: 1. 1. Match existing color and texture. Color as selected by Architect from manufacturer’s full range of colors 2.4 MORTAR MATERIALS A. Provide mortar materials that comply with Division 4 Section "Unit Masonry.” B. Portland Cement: ASTM C 150, Type I or II, except Type III may be used for cold-weather construction. Provide natural color, white, or a blend to produce mortar color indicated. C. Hydrated Lime: ASTM C 207, Type S. D. Portland Cement-Lime Mix: Packaged blend of portland cement complying with ASTM C 150, Type I or Type III, and hydrated lime complying with ASTM C 207.

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1. For pigmented mortars, use colored portland cement-lime mix of formulation required to produce color indicated or, if not indicated, as selected from manufacturer's standard formulations. Pigments shall not exceed 10 percent of portland cement by weight for mineral oxides or 2 percent for carbon black. E. Masonry Cement: ASTM C 91. 1. For pigmented mortars, use colored masonry cements of formulation required to produce color indicated or, if not indicated, as selected from manufacturer's standard formulations. Pigments shall not exceed 5 percent of masonry cement by weight for mineral oxides or 1 percent for carbon black. F. Mortar Cement: ASTM C 1329. 1. For pigmented mortars, use colored mortar cements of formulation required to produce color indicated or, if not indicated, as selected from manufacturer's standard formulations. Pigments shall not exceed 5 percent of mortar cement by weight for mineral oxides or 1 percent for carbon black. G. Mortar Aggregate: ASTM C 144. 1. White-Mortar Aggregates: Natural, white sand or ground, white stone. 2. Colored-Mortar Aggregates: Natural, colored sand or ground marble, granite, or other sound stone; as required to match Architect's sample. H. Mortar Pigments: Natural and synthetic iron oxides and chromium oxides, compounded for use in mortar mixes. Use only pigments with record of satisfactory performance in masonry mortars. I. Water: Potable. 2.5 ACCESSORIES A. Anchors: Type and size indicated, fabricated from stainless steel complying with ASTM A 276 or ASTM A 666, Type 304. B. Anchors: Type and size indicated, fabricated from steel complying with ASTM A 36/A 36M, and hot-dip galvanized to comply with ASTM A 123. C. Dowels: Round stainless-steel bars complying with ASTM A 276, Type 304, 1/2-inch (12-mm) diameter. D. Dowels: Round steel bars complying with ASTM A 36/A 36M or ASTM A 615/A 615M, 1/2-inch diameter, and hot-dip galvanized to comply with ASTM A 123. E. Job-Mixed Detergent Solution: Solution of 1/2 cup of dry-measure tetrasodium polyphosphate and 1/2 cup of dry-measure laundry detergent dissolved in 1 gal. of water. F. Proprietary Acidic Cleaner: Manufacturer's standard-strength, general-purpose cleaner designed for removing mortar/grout stains, efflorescence, and other construction stains from new masonry surfaces without discoloring or damaging masonry surfaces; expressly approved for intended use by cast stone manufacturer and expressly approved by cleaner manufacturer for use on cast stone and adjacent masonry materials. 1. Available Products: Subject to compliance with requirements, products that may be used to clean unit masonry surfaces include, but are not limited to, the following: 2. Products: Subject to compliance with requirements, provide one of the following: a. 202 New Masonry Detergent; Diedrich Technologies, Inc. b. 202V Vana-Stop; Diedrich Technologies, Inc. c. Sure Klean No. 600 Detergent; ProSoCo, Inc. d. Sure Klean Vana Trol; ProSoCo, Inc. Cast Stone 04 72 00 - 4 of 6 Alpena Community College Center for Health Sciences- Van Lare Hall Renovation 17.520 9/27/2019 Plan Review and Permit

2.6 MORTAR MIXES A. Comply with requirements in Division 4 Section "Unit Masonry" for mortar mixes. B. Setting Mortar: Comply with ASTM C 270, Proportion Specification, Type S. 1. Limit cementitious materials to portland cement and lime. 2. Pigmented Mortar: Select and proportion pigments with other ingredients to produce color required. Do not exceed pigment-to-cement ratio of 1:10, by weight. 3. Packaged Portland Cement-Lime Mix Mortar: Use portland cement-lime mix of selected color. 4. Mortar Cement Mortar: Use mortar cement of selected color. 5. Masonry Cement Mortar: Use masonry cement of selected color. 6. Colored-Aggregate Mortar: Produce color required by combining colored aggregates with portland cement of selected color. 2.7 SOURCE QUALITY CONTROL A. Employ an independent testing agency to sample and test cast stone units according to ASTM C 1364. 1. Include testing for freezing and thawing resistance.

PART 3 – EXECUTION 3.1 EXAMINATION A. Examine substrates and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance of cast stone. B. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 INSTALLATION A. Install cast stone units to comply with requirements in Division 4 Section "Unit Masonry" for installing stone units. B. Set cast stone as indicated on Drawings. Install anchors, supports, fasteners, and other attachments indicated or necessary to secure units in place. Set units accurately in locations indicated with edges and faces aligned according to established relationships and indicated tolerances. C. Drench units with clear water just before setting. D. Set units in full bed of mortar with full head joints, unless otherwise indicated. Build anchors and ties into mortar joints as units are set. 1. Fill dowel holes and anchor slots with mortar. 2. Fill collar joint solid as units are set. 3. Build concealed flashing into mortar joints as units are set. 4. Leave head joints open in coping and other units with exposed horizontal surfaces. Keep joints clear of mortar, and rake out to receive sealant. E. Rake out joints for pointing with mortar to depths of not less than 3/4 inch. Rake joints to uniform depths with square bottoms and clean sides. Scrub faces of units to remove excess mortar as joints are raked.

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F. Point mortar joints by placing and compacting mortar in layers not greater than 3/8 inch. Compact each layer thoroughly and allow to become thumbprint hard before applying next layer. G. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint thickness, unless otherwise indicated. H. Provide expansion, control, and pressure-relieving joints of widths and at locations indicated. 1. Sealing joints is specified in Division 7 Section "Joint Sealants." 2. Keep joints free of mortar and other rigid materials. 3.3 INSTALLATION TOLERANCES A. Variation from Plumb: Do not exceed 1/8 inch in 10 feet or 1/4 inch in 20 feet or more. B. Variation from Level: Do not exceed 1/8 inch in 10 feet 1/4 inch in 20 feet or 3/8 inch maximum. C. Variation in Joint Width: Do not vary joint thickness more than 1/8 inch in 36 inches or one-fourth of nominal joint width, whichever is less. D. Variation in Plane between Adjacent Surfaces (Lipping): Do not exceed 1/16-inch difference between planes of adjacent units or adjacent surfaces indicated to be flush with units. 3.4 ADJUSTING AND CLEANING A. Remove and replace stained and otherwise damaged units and units not matching approved Samples. Cast stone may be repaired if methods and results are approved by Architect. B. Replace units in a manner that results in cast stone matching approved Samples, complying with other requirements, and showing no evidence of replacement. C. In-Progress Cleaning: Clean cast stone as work progresses. Remove mortar fins and smears before tooling joints. D. Final Cleaning: After mortar is thoroughly set and cured, clean exposed cast stone as follows: 1. Remove large mortar particles by hand with wooden paddles and nonmetallic scrape hoes or chisels. 2. Protect adjacent surfaces from contact with cleaner by covering them with liquid strippable masking agent, polyethylene film, or waterproof masking tape. 3. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by rinsing thoroughly with clear water. 4. Clean cast stone by bucket and brush hand-cleaning method described in BIA Technical Notes No. 20 Revised II, using job-mixed detergent solution. 5. Clean cast stone with proprietary acidic cleaner applied according to manufacturer's written instructions. END OF SECTION 04720

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SECTION 04 81 00 UNIT MASONRY ASSEMBLIES

PART 1 - GENERAL

1.01 SECTION INCLUDES A. Concrete Masonry Units (CMU) B. Reinforcement and Anchorage. C. Lintels. D. Accessories.

1.02 RELATED SECTIONS A. Division 4 - Mortar and Masonry Grout, Veneer Masonry, Cast Stone B. Division 5 - Metal Fabrications: Loose steel lintels. C. Division 6 - Rough Carpentry: Nailing strips built into masonry. D. Division 7 - Board and Batt Insulation: Insulation for cavity spaces. E. Division 7 - Firestopping: Firestopping at penetrations of masonry work. F. Division 7 - Joint Sealers: Backing rod and sealant at control and expansion joints. G. Division 7 - Sheet Metal Flashing & Trim

1.03 REFERENCES A. ACI 530/ASCE 5/TMS 402 - Building Code Requirements for Masonry Structures; American Concrete Institute. B. ASTM C 55 - Standard Specification for Concrete Building Brick. C. ASTM C 62 - Standard Specification for Building Brick (Solid Masonry Units Made From Clay or Shale). D. ASTM C 67 - Standard Test Methods of Sampling and Testing Brick and Structural Clay Tile. E. ASTM C 90 - Standard Specification for Load-Bearing Concrete Masonry Units. F. ASTM C 140 - Standard Methods of Sampling and Testing Concrete Masonry Units. G. ASTM C 216 - Standard Specification for Facing Brick (Solid Masonry Units Made From Clay or Shale). H. ASTM C 652 - Standard Specification for Hollow Brick (Hollow Masonry Units Made From Clay or Shale). I. ASTM C 780 - Standard Test Method for Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry J. ASTM D 226 - Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing. K. ASTM E1677-95(2000) Standard Specification for an Air Retarder (AR) Material or System for Low-Rise Framed Building Walls L. ASTM E96-00e1 Standard Test Methods for Water Vapor Transmission of Materials M. ASTM D-882 D882-01 Standard Test Method for Tensile Properties of Thin Plastic Sheeting N. ASTM D117-96 Standard Guide for Sampling, Test Methods, Specifications, and Guide for Electrical Insulating Oils of Petroleum Origin O. ASTM E-84-97a E84-01 Standard Test Method for Surface Burning Characteristics of Building Materials P. IMIAWC (CW) - Cold Weather Masonry Construction Guide -- Specifications and Recommended Practices; International Masonry Industry All-Weather Council. Q. IMIAWC (HW) - Recommended Practices & Guide Specifications for Hot Weather Masonry Construction; International Masonry Industry All-Weather Council. R. UL (FRD) - Fire Resistance Directory; Underwriters Laboratories Inc. S. Indiana Limestone Institute: Indiana Limestone Handbook, 20th edition

1.04 SUBMITTALS A. Product Data: Provide data for masonry units, fabricated wire reinforcement, flashings, mortar, and accessories and for all types of product indicated. Unit Masonry Assemblies 04 81 00 - 1 of 13 Alpena Community College Center for Health Sciences- Van Lare Hall Renovation 17.520 9/27/2019 Plan Review and Permit

B. Shop Drawings: For reinforcing steel. Detail bending and placement of unit masonry reinforcing bars. Comply with ACI 315, "Details and Detailing of Concrete Reinforcement. Show elevations of reinforced walls. C. Samples for each type and color of exposed masonry units and colored mortars. D. Material Certificates: For each type of product indicated. Include statements of material properties indicating compliance with requirements including compliance with standards and type designations within standards. 1. For masonry units include material test reports substantiating compliance with requirements. E. Mix Designs: For each type of mortar and grout. Include description of type and proportions of ingredients.

1.05 QUALITY ASSURANCE A. Comply with provisions of ACI 530/ASCE 5/TMS 402 and ACI 530.1/ASCE 6/TMS 602, except where exceeded by requirements of the contract documents. 1. Maintain one copy of each document on project site. B. Fire Rated Assemblies: Conform to Michigan State Building Code for UL Assembly No. as shown on drawings.

1.06 PRE-INSTALLATION MEETING A. Convene one week before starting work of this section.

1.07 DELIVERY, STORAGE, AND HANDLING A. Deliver, handle, and store masonry units by means that will prevent mechanical damage and deterioration due to moisture, temperature changes, and contamination by other materials. 1. Provide protection which will limit moisture absorption of concrete masonry units t the maximum percentage specified for Type I units at a relative humidity which I normal for the project site. 2. Protect cementitious materials from precipitation and absorption of ground moisture. Store masonry accessories to prevent corrosion, dirt accumulation, and other deterioration. B. Handle and store ceramic glazed masonry units in protective cartons or trays. Do not remove from protective packaging until ready for installation.

1.08 PROJECT CONDITIONS A. Construction Protection: Cover tops of incomplete masonry elements with waterproof sheet material at end of each work day and when masonry work is not under way. 1. Secure weather protection in place with weights or by use of temporary fasteners. 2. Immediately remove mortar, soil, and other such materials from exposed masonry face to prevent staining. 3. Prevent splashing and soiling of masonry near ground level by spreading sheet material to cover soil or masonry faces. 4. Protect horizontal masonry elements from mortar droppings B. Loading Protection: Do not apply uniform floor or roof loads for at least 12 hours, or concentrated loads for at least 3 days, after completion of masonry elements B. Handle and store ceramic glazed masonry units in protective cartons or trays. Do not remove from protective packaging until ready for installation.

1.09 ENVIRONMENTAL REQUIREMENTS A. Cold-Weather Protection: Do not lay masonry units which have wet surfaces or units which are below freezing. Remove ice or snow from masonry bed by careful application of heat. Remove masonry damaged by freezing. 1. General: Comply with the following construction procedures for masonry construction based on air temperatures at time of installation: a. 40 degrees F to 32 degrees F: Maintain mortar temperature between 40 degree F and 120 degrees F by heating water or sand before mixing. Protect masonry from rain or snow for at least 24 hours by covering with weather-resistive membrane.

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1) Add approved mortar additive, following manufacturer's directions of adding and mixing into mortar. b. 25 degrees F and below: Masonry shall not be laid up unless enclosed heated shelters are provided and maintained. 2. Grouted construction: On any day when minimum anticipated nighttime temperature is 32 degrees F or less, in addition to complying with general procedures above, heat grout materials to 90 degrees F to produce in-place grout temperature of not less that 70 degrees F at end of work day. Retain protective blankets or enclosures for not less than 48 hours. 3. Clay masonry units: Comply with the following requirements for clay masonry unit which must be wetted before laying because of initial rate of absorption (suction greater than 1 gram per square inch per minute (ASTM C 67): a. Surface temperatures above 32 degrees F: Sprinkle with water heated to 7 degrees F or above, just before laying. b. Surface temperatures below 32 degrees F: Comply with requirements of cold- weather protection listed above. 4. Water: Do not heat water for mortar or grout to more than 160 degrees F. B. Maintain materials and surrounding air temperature to minimum 40 degrees F prior to, during, and 48 hours after completion of masonry work. C. Cold Weather Requirements: Comply with IMIAWC (CW). D. Hot-Weather Protection: Cover or shade masonry units and mortar materials and use coo water for mortar whenever ambient air temperature is 90 degrees F or greater. At ai temperatures of 85 degrees F or above, if relative humidity is less than 30 percent or win is in excess of 15 miles per hour, provide protection by immediately covering new constructed walls, by providing windbreaks, or by using fog spray to reduce rate o evaporation. E. Maintain materials and surrounding air temperature to maximum 90 degrees F prior to, during, and 48 hours after completion of masonry work. F. Hot Weather Requirements: Comply with IMIAWC (HW).

PART 2 - PRODUCTS

2.01 CONCRETE MASONRY UNITS A. Concrete Block: Comply with referenced standards and as follows: 1. Size: Standard units with nominal face dimensions of 16x12 and 16x8 inches and nominal depths as indicated on the drawings for specific locations. a. Special Shapes: Provide non-standard blocks configured for corners, lintels, headers, control joint edges, and other detailed conditions. 1) Outside corners: Bullnose units - typical. (Exposed areas only). Examples where required: Door jambs, "outside" type corners, etc. 2) Control joints: Standard sash block units with score in end to receive control joint insert. Lay vertically (continuous) at each side of joint - utilizing whole and half size units. 2. Load-Bearing and non Load-Bearing Units: ASTM C 90. a. Hollow block, as indicated. b. Type II - Nonmoisture-controlled; medium weight. c. Exposed faces: Manufacturer's standard color and texture where indicated. B. Shapes: Provide special shapes for lintels, corners, jambs, sashes, movement joints, headers, bonding, and other special conditions. C. Integral Water Repellent: Provide units made with liquid polymeric, integral water-repellent admixture that does not reduce flexural bond strength for exposed units and where indicated. 1. Products: a. Addiment Incorporated; Block Plus W-10. b. Grace Construction Products, a unit of W. R. Grace & Co. - Conn.; Dry-Block. c. Master Builders, Inc.; Rheopel. D. Concrete Masonry Units: ASTM C 90 1. Unit Compressive Strength: Provide units with compressive strength as indicated. 2. Weight Classification: Medium weight.

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E. Non-Load Bearing Split-Face CMU 1. Color as selected by Architect from manufacturer’s full range of colors

2.02 MORTAR AND GROUT MIXES A. Mortar and grout: As specified in Section 04065.

2.03 REINFORCEMENT AND ANCHORAGE A. Reinforcing Bars: ASTM A 615, Grade 60, deformed, except as specifically indicated otherwise. 1. Bending: Shop-fabricate reinforcing bars which are shown to be bent or hooked. 2. Comply with additional specification requirements on structural drawings B. Anchorage Materials: Comply with the following general requirements for materials required in reinforcement and anchorage devices: 1. Wall Plugs: 26 gauge mill galvanized steel, plain ribbed type. a. Equal to: "Product No. 335"; Heckmann Building Products Co. 2. Zinc-coated steel sheet: ASTM A 525 carbon steel, with G90 zinc coating. a. Use: Dovetail slots and similar applications. 3. Hot-dip galvanized steel sheet: ASTM A 635 or ASTM A 366; galvanizing in compliance with ASTM A 153, Class B. a. Use: Anchors and miscellaneous sheet metal in masonry accessories at exterior exposures. 4. Manufacturers: Products of the following manufacturers, provided they comply with requirements of the contract documents, will be among those considered acceptable: a. AA Wire Products Company. b. Dur-O-Wal, Inc. c. Heckmann Building Products, Inc. d. National Wire Products Industries, Inc. e. Hohmann & Barnard, Inc. C. Joint Reinforcement: 1. Welded-wire units prefabricated into straight lengths of not less than 10 feet, with deformed continuous side rods and plain cross rods. a. Steel wire: ASTM A 82. 1) Zinc coating: ASTM A 641, regular mill galvanized. Use: Interior wall locations. 2) Hot-dip galvanizing (after fabrication): ASTM A 153, Class B-2. Use: Exterior wall locations or walls in contact with earth. 3) Width: Approximately two inches less than nominal wall width, providing not less than 5/8 inch mortar coverage on exterior exposures and ½ inch elsewhere. b. Wire Sizes: 1) Side rod diameter: 9 gauge (0.1495 inch) diameter 2) Cross rod diameter: 9 gauge (0.1495 inch) diameter c. Configuration: 1) Applications of single unit width: Truss design, diagonal cross rods at not more than 16 inches on center. 2) Applications of more than one unit width: Hook and eye design, with double eye sections welded to wall reinforcing 16 inches on center. Rectangular adjustable wall tie pintle sections are to be fitted into "double-eye" sections of wall reinforcing to complete the assembly. 3) Applications for grout pour infill in core: Ladder type. 4) Corners: Prefabricated L- and T-shaped units. 2. Flexible Anchors: 2-piece anchors permitting vertical or horizontal differential movement between masonry and structural frame but preventing lateral movement of masonry out of plane. a. For concrete framework, provide dovetail anchor sections formed from 12 gage sheet metal, and triangular wire ties 0.1875 inch thick; size ties to fall no more than 1 inch short of masonry face. 1) Furnish dovetail slots of sizes indicated, with filler strips, fabricated from not less than 22 gage sheet metal, for installation under Division 3. b. For steel framework, provide crimped wire anchor section 0.25 inch thick for welding and

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triangular wire tie 0.1875 inch thick; size ties to fall no more than 1 inch short of masonry face. 3. Adjustable Masonry Veneer anchors: 2-piece anchors permitting vertical or horizontal differential movement between masonry veneer and structural frame but preventing lateral movement of masonry out of plane and resisting tensile and compressive forces perpendicular to wall. 4. For adjustable wire ties connecting cast stone and brick veneer to CMU backup, provide.1875 inch diameter eyes welded to side rods and cross rods specified above, and .1875 inch triangular tab-type pintles. Size ties to fall no more than 1” short of masonry face each side of wall. 5. At exterior walls, verify selection vs. enlarged cavity size indicated on drawings. 6. Ties shall have at least two .1875 inch diameter pintle legs in conformance with ACI 530. 7. Joint Stabilization Anchors: option to provide at masonry piers perpendicular to battered walls in lieu of toothed-in integral masonry pier. D. Anchor Bolts: ASTM A 307, Grade A, non-galvanized, hooked anchor bolt with flat washer and threaded nut for blocking attachment. 1. To be used for non-structural uses only, such as wood blocking attachments. 2. Sizes: Provide the following unless called out otherwise on drawings: a. Diameter: ½ inch. b. Length: Straight shaft length of "blocking thickness" plus 10 inches; bottom hook length of 2 inches; threaded length of "blocking thickness" plus 1-1/2 inches. E. Materials: 1. Hot-Dip Galvanized, Carbon-Steel Wire: ASTM A 82; with ASTM A 153/A 153M, Class B-2 coating. 2. Steel Sheet, Galvanized after Fabrication: ASTM A 1008/A 1008M, Commercial Steel, hot-dip galvanized after fabrication to comply with ASTM A 153/A 153M. 3. Steel Plates, Shapes, and Bars: ASTM A 36/A 36M. F. Wire Ties, General: Unless otherwise indicated, size wire ties to extend at least halfway through veneer but with at least 5/8-inch cover on outside face. Outer ends of wires are bent 90 degrees and extend 2 inches (50 mm) parallel to face of veneer. G. Individual Wire Ties: Rectangular units with closed ends and not less than 4 inches wide. 1. Wire: Fabricate from [3/16-inch] [1/4-inch] diameter, hot-dip galvanized steel wire. H. Adjustable Anchors for Connecting to Structure: Provide anchors that allow vertical or horizontal adjustment but resist tension and compression forces perpendicular to plane of wall. 1. Anchor Section for Welding to Steel Frame: Crimped 1/4-inch diameter, hot-dip galvanized steel wire. 2. Tie Section: Triangular-shaped wire tie, sized to extend within 1 inch of masonry face, made from [0.188-inch] [0.25-inch] diameter, hot-dip galvanized steel wire. 3. Connector Section for Concrete: Dovetail tabs for inserting into dovetail slots in concrete and attached to tie section; formed from [0.053-inch] [0.097-inch] thick, steel sheet, galvanized after fabrication. I. Partition Top anchors: 0.097-inch thick metal plate with 3/8-inch diameter metal rod 6 inches long welded to plate and with closed-end plastic tube fitted over rod that allows rod to move in and out of tube. Fabricate from steel, hot-dip galvanized after fabrication. J. Rigid Anchors: Fabricate from steel bars 1-1/2 inches wide by 1/4 inch thick by 24 inches long, with ends turned up 2 inches or with cross pins. 1. Corrosion Protection: Hot-dip galvanized to comply with ASTM A 153/A 153M Epoxy coating 0.020 inch thick.

2.04 MORTAR CATCHING FABRIC MATERIAL A. Mortar Net Material: Continuous drainage system at base of wall between face brick veneer and backup wall. System is composed of high density polyethylene or nylon mesh in trapezoid configuration designed to allow moisture to flow downward in the cavity or collar joint to masonry flashing and weeps and hence to the exterior. B. Project design and contract documents are based on the following product/manufacture. 1. Product MN 10-2; Mortar Net USA, Ltd. 2. Product specification: a. Height/thickness: 10” high section x 2” thick Unit Masonry Assemblies 04 81 00 - 5 of 13 Alpena Community College Center for Health Sciences- Van Lare Hall Renovation 17.520 9/27/2019 Plan Review and Permit

b. Length of section: 5 feet.

2.05 FLASHINGS A. Flexible Sheet Flashing: High density, cross-laminated polyethylene film with minimum thickness of 40 mils. Material to be fully adhering, self-adhering, through wall flashing membrane, supplied in rolls with a silicone coated release paper. Provide where flashing is not exposed to the exterior. 1. Manufacturer: Provide the following product: a. "Perm-A-Barrier Wall Flashing"; Grace Masonry Products. b. "Flashing Mastic" which is approved for use with flashing material to be applied per manufacturers direction for total flashing system. 2. EPDM Flashing: Sheet flashing product made from ethylene-propylene-diene terpolymer, complying with ASTM D 4637, 0.040 inch thick. a. Products: 1) Carlisle Coatings & Waterproofing; Pre-Kleened EPDM Thru-Wall Flashing. 2) Firestone Building Products; FlashGuard. 3) Heckmann Building Products Inc.; No. 81 EPDM Thru-Wall Flashing. B. Metal Flashing: Provide where flashing is exposed or partly exposed and where indicated, complying with Division 7 “Sheet Metal Flashing and Trim”. 1. Stainless Steel: 0.0156 inch thick 2. Do not use explosive-actuated fasteners for affixing flashings and counter-flashings. 3. Fabricate metal expansion-joint strips. 4. Fabricate metal drip edges to extend at least 3 inches into wall and ½ inch out from wall, with a hemmed outer edge bent down 30 degrees. 5. Fabricate metal flashing terminations to extend at least 3 inches into wall and out to exterior face of wall. At exterior face of wall, bend metal back on itself for ¾ inch and then down into joint 3/8 inch to form a stop for retaining sealant backer rod. 6. Metal Drip Edges: Fabricate from stainless steel. Extend at least 3 inches into wall and 1/2 inch out from wall, with outer edge bent down 30 degrees and hemmed. 7. Metal Flashing Terminations: Fabricate from stainless steel. Extend at least 3 inches into wall and out to exterior face of wall. At exterior face of wall, bend metal back on itself for 3/4 inch and down into joint 3/8 inch to form a stop for retaining sealant backer rod. 8. Metal Expansion-Joint Strips: Fabricate from stainless steel copper to shapes indicated. 9. Adhesives, Primers, and Seam Tapes for Flashings: Flashing manufacturer’s standard product or products recommended by flashing manufacturer for bonding flashing sheets to each other and to substrates.

2.06 ACCESSORIES A. Expansion Joint Strips (Brick Veneer): Neoprene filler strips complying with ASTM D 1056, Grade 1. RE41, capable of 50 percent compression and sized for specific conditions indicated. 2. For use in expansion/control joint construction in face brick veneer and at relief angle brick shelf. 3. Material pad size: 3/8" thick x 3" depth for standard joint width, with adhesive on one side for temporary attachment. Provide thicknesses for wider joint requirements if shown and detailed on Architect's drawings. 4. Approved product type: 5. "Rapid Expansion Joint-#2015"; Dur-O-Wall, Inc. 6. "#1056 Joint Filler"; Williams Products, Inc. 7. Equal to product listed above. B. Resilient Wall Pads: For use below floor/roof decks at top of masonry walls. 1. General: To prevent floor/roof deck from transferring loads direct to top of masonry walls. Not indicated on Drawings 2. Project design and contract documents are based products of the following manufacturer: a. "Williams Products, Inc." 3. Wall types and products for use: a. Non-rated walls: Compressible foam pad cut profile of floor deck ribs and also allowing

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minimum of ½" for deflection. Width required: wall width minus 2". 1) "EJ 2000 Closure Plug" b. Rated walls: ASTM E-84, ASTM E-119; Compressible fiber pad, fully resistible to fire applications. 1) "Williams Dynashield Ceramic Fiber". C. Preformed Control Joint Gaskets: Styrene-butadiene Rubber compound complying with ASTM D 2000, M2AA-805 or polyvinyl chloride complying with ASTM D 2287, Type PVC 654-4 material. Provide with corner and tee accessories, fused joints. 1. Strips sized for standard sash block and designed to allow movement while maintaining lateral stability. 2. Manufacturers: a. Dur-O-Wall, Inc. Model Rubber: "D/A 2001". b. Dur-O-Wall, Inc. Model P.V.C: "D/A 2002". D. Building Paper: ASTM D 226, Type I ("No.15") asphalt felt. E. Bond-Breaker Strips: Asphalt-saturated, organic roofing felt complying with ASTM D 226, Type I (No. 15 asphalt felt). F. Nailing Strips: Preservative and fire-retarding treated softwood, as specified in Section 06100 - Rough Carpentry. G. Cavity Drainage Material: Provide 1 3/4" thick, free-draining mesh made from polyethylene strands and shaped to avoid being clogged by mortar droppings. H. Weeps: 1. Exterior walls: Aluminum Weep Hole/Vent consisting of one-piece, L-shaped units made from sheet aluminum, designed to fit into head joint and consisting of vertical channel with louvers stamped in web and with top flap to keep mortar out of head joint; painted to comply with Division 9 requirements before installation, in color approved by Architect to match that of mortar. a. Equal to Hohmann & Barnard, Inc.; #343W “Wilko Weep Hole”, and having similar appearance I. Board Insulation: as specified in Division 07 - Board & Batt Insulation

2.07 MASONRY CLEANER A. Concrete Masonry Units (Masonry Block): 1. Detergent Solution: Job-mixed solution of ½ cup tri-sodium phosphate and ½ cup laundry detergent per gallon of water. 2. Designed for removing mortar (grout stains from new masonry without causing damage).

PART 3 - EXECUTION

3.01 EXAMINATION A. Verify that field conditions are acceptable and are ready to receive masonry. Correct any unsatisfactory conditions prior to proceeding. B. Verify that related items provided under other sections are properly sized and located. C. Verify that built-in items are in proper location, and ready for roughing into masonry work.

3.02 PREPARATION A. Direct and coordinate placement of metal anchors supplied for installation under other sections. B. Provide temporary bracing during installation of masonry work. Maintain in place until building structure provides permanent bracing.

3.03 COURSING A. Establish lines, levels, and coursing indicated. Protect from displacement. B. Maintain masonry courses to uniform dimension. Form vertical and horizontal joints of uniform thickness. C. Concrete Masonry Units: 1. Bond: Running. 2. Mortar Joints: Concave.

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3.04 PLACING AND BONDING A. Lay solid masonry units in full bed of mortar, with full head joints, uniformly jointed with other work. B. Lay hollow masonry units with face shell bedding on head and bed joints C. Buttering corners of joints or excessive furrowing of mortar joints is not permitted. D. Remove excess mortar as work progresses. E. Interlock intersections and external corners, except for units laid in stack bond. F. Do not shift or tap masonry units after mortar has achieved initial set. Where adjustment must be made, remove mortar and replace. G. Perform job site cutting of masonry units with proper tools to provide straight, clean, unchipped edges. Prevent broken masonry unit corners or edges. 1. Cut units with motor-driven saws 2. Allow units to dry before laying 3. Install cut units with cut surfaces and where possible, cut edges concealed. H. Cut mortar joints flush where wall tile is scheduled or resilient base is scheduled. I. Isolate masonry partitions from vertical structural framing members with a control joint as indicated. J. Isolate top joint of masonry partitions from horizontal structural framing members and slabs or decks with compressible joint filler. K. Lay clay tile flue linings vertically, bedded in concrete block units. Extend above chimney cladding 8 inches . Trowel mortar smooth over chimney cladding and slope for positive drainage. L. Place precast chimney cap atop chimney masonry; mortar into place; seal to protruding flue. M. Select and arrange units for exposed unit masonry to produce a uniform blend of colors and textures.

3.05 FLASHING, WEEP HOLES, CAVITY DRAINAGE AND VENTS A. Install weeps in veneer and cavity walls at 24 inches on center horizontally above all through-wall flashing locations. Do not install below grade. B. General: Install embedded flashing and weep holes in masonry at shelf angles, lintels, ledges, other obstructions to downward flow of water in wall, and where indicated. Install vents at shelf angles, ledges, and other obstructions to upward flow of air in cavities, and where indicated. C. Install flashing as follows, unless otherwise indicated: 1. Prepare masonry surfaces so they are smooth and free from projections that could puncture flashing. Where flashing is within mortar joint, place through-wall flashing on sloping bed of mortar and cover with mortar. Before covering with mortar, seal penetrations in flashing as recommended by flashing manufacturer. 2. At lintels and shelf angles, extend flashing a minimum of 6 inches into masonry at each end. At heads and sills, extend flashing 6 inches at ends and turn up not less than 2 inches to form end dams. 3. Install metal drip edges beneath flexible flashing at exterior face of wall. Stop flexible flashing 1/2 inch back from outside face of wall and adhere flexible flashing to top of metal drip edge. 4. Install metal flashing termination beneath flexible flashing at exterior face of wall. Stop flexible flashing 1/2 inch back from outside face of wall and adhere flexible flashing to top of metal flashing termination. D. Install weep holes in head joints in exterior wythes of first course of masonry immediately above embedded flashing and as follows: 1. Use specified weep/vent products to form weep holes. 2. Space weep holes 24 inches O.C., unless otherwise indicated. 3. Cover cavity side of weep holes with plastic insect screening at cavities insulated with loose- fill insulation. E. Place cavity drainage material in cavities to comply with configuration requirements for cavity drainage material in Part 2 "Miscellaneous Masonry Accessories" Article. F. Install vents in head joints in exterior wythes at spacing indicated. Use specified weep/vent products to form vents. 1. Close cavities off vertically and horizontally with blocking in manner indicated. Install through- wall flashing and weep holes above horizontal blocking.

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3.06 CAVITY WALLS A. Do not permit mortar to drop or accumulate into cavity air space or to plug weeps. B. Build inner wythe ahead of outer wythe to receive cavity insulation and air/vapor barrier adhesive. C. Bevel beds away from cavity, to minimize mortar protrusions into cavity. D. Bond wythes of cavity walls together using one of the following methods: 1. Individual Metal Ties: Provide ties as shown installed in horizontal joints, but not less than one metal tie for 4.5 sq. ft. of wall area spaced not to exceed 24 inches (610 mm) O.C. horizontally and 16 inches O.C. vertically. Stagger ties in alternate courses. Provide additional ties within 12 inches (305 mm) of openings and space not more than 36 inches (915 mm) apart around perimeter of openings. At intersecting and abutting walls, provide ties at no more than 24 inches (610 mm) O.C. vertically. 2. Masonry Joint Reinforcement: Installed in horizontal mortar joints. a. Where bed joints of both wythes align, use ladder-type reinforcement extending across both wythes. b. Where bed joints of wythes do not align, use adjustable (two-piece) type reinforcement with continuous horizontal wire in facing wythe attached to ties]. c. Where one wythe is of clay masonry and the other of concrete masonry, use adjustable (two-piece) type reinforcement with continuous horizontal wire in facing wythe attached to ties] to allow for differential movement regardless of whether bed joints align. 3. Masonry Veneer Anchors: Comply with requirements for anchoring masonry veneers. E. Keep cavities clean of mortar droppings and other materials during construction. Bevel beds away from cavity, to minimize mortar protrusions into cavity. Do not attempt to trowel or remove mortar fins protruding into cavity. F. Parge cavity face of backup wythe in a single coat approximately 3/8 inch thick. Trowel face of parge coat smooth. G. Coat cavity face of backup wythe to comply with Division 7 Section "Dampproofing and Waterproofing."

3.07 LAYING MASONRY WALLS A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint thicknesses and for accurate location of openings, movement-type joints, returns, and offsets. Avoid using less-than-half-size units, particularly at corners, jambs, and, where possible, at other locations. B. Bond Pattern for Exposed Masonry: Unless otherwise indicated, lay exposed masonry in running bond; do not use units with less than nominal 4-inch horizontal face dimensions at corners or jambs. C. Built-in Work: As construction progresses, build in items specified in this and other Sections. Fill in solidly with masonry around built-in items. D. Fill space between steel frames and masonry solidly with mortar, unless otherwise indicated. E. Fill cores in hollow concrete masonry units with grout 24 inches under bearing plates, beams, lintels, posts, and similar items, unless otherwise indicated.

3.08 MORTAR BEDDING AND JOINTING A. Lay hollow brick and concrete masonry units as follows: 1. With face shells fully bedded in mortar and with head joints of depth equal to bed joints. 2. With webs fully bedded in mortar in all courses of piers, columns, and pilasters. 3. With webs fully bedded in mortar in grouted masonry, including starting course on footings. 4. With entire units, including areas under cells, fully bedded in mortar at starting course on footings where cells are not grouted. B. Lay solid masonry units with completely filled bed and head joints; butter ends with sufficient mortar to fill head joints and shove into place. Do not deeply furrow bed joints or slush head joints. C. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint thickness, unless otherwise indicated. D. Cut joints flush for masonry walls to receive plaster or other direct-applied finishes (other than paint), unless otherwise indicated.

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3.09 REINFORCEMENT AND ANCHORAGE - SINGLE WYTHE MASONRY A. Install horizontal joint reinforcement 8 inches on center. B. Place masonry joint reinforcement in first and second horizontal joints above and below openings. Extend minimum 16 inches each side of opening. C. Place continuous joint reinforcement in first and second joint below top of walls. D. Lap joint reinforcement ends minimum 6 inches. E. Reinforce stack bonded unit joint corners and intersections with strap anchors 16 inches on center.

3.10 REINFORCEMENT AND ANCHORAGES - CAVITY WALL MASONRY A. Install joint reinforcement 16 inches on center 1. Install in mortar with minimum cover of 5/8” on exterior or side of walls and ½” elsewhere. Lap reinforcement a minimum of 6 inches. B. Place masonry joint reinforcement in first and second horizontal joints above and below openings. Extend minimum 16 inches each side of openings. C. Place continuous joint reinforcement in first and second joint below top of walls. D. Fasten anchors to concrete or masonry backup and embed in masonry joints as masonry is laid. Space anchors at maximum of 16 inches horizontally and 16 inches vertically. E. Provide not less than 1 1/2” between back of veneer unit and face of insulation F. Reinforce stack bonded unit joint corners and intersections with strap anchors 16 inches on center. G. Interrupt joint reinforcement at control and expansion joint. H. Provide continuity at wall intersections by using prefabricated T-shaped units. I. Provide continuity at converse by using prefabricated L-shaped units.

3.11 ANCHORING MASONRY TO STRUCTURAL MEMBERS A. Anchor masonry to structural members where masonry abuts or faces structural members to comply with the following: 1. Provide an open space not less than 1/2 inch (13 mm) in width between masonry and structural member, unless otherwise indicated. 2. Anchor masonry to structural members with anchors embedded in masonry joints and attached to structure. 3. Space anchors as indicated, but not more than 24 inches (610 mm) o.c. vertically and 36 inches (915 mm) o.c. horizontally.

3.12 REINFORCED UNIT MASONRY INSTALLATION A. Temporary Formwork and Shores: Construct formwork and shores as needed to support reinforced masonry elements during construction. 1. Construct formwork to provide shape, line, and dimensions of completed masonry as indicated. Make forms sufficiently tight to prevent leakage of mortar and grout. Brace, tie, and support forms to maintain position and shape during construction and curing of reinforced masonry. 2. Do not remove forms and shores until reinforced masonry members have hardened sufficiently to carry their own weight and other temporary loads that may be placed on them during construction. B. Placing Reinforcement: Comply with requirements in ACI 530.1/ASCE 6/TMS 602. C. Grouting: Do not place grout until entire height of masonry to be grouted has attained enough strength to resist grout pressure. D. Comply with requirements in ACI 530.1/ASCE 6/TMS 602 for cleanouts and for grout placement, including minimum grout space and maximum pour height. E. Limit height of vertical grout pours to not more than 60 inches.

3.13 GROUTED COMPONENTS A. Reinforce bond beams with 2, No. 4 bars, 1 inch from bottom web unless noted otherwise on drawings.

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B. At bearing locations, fill masonry cores with grout for a minimum 12 inches either side of opening.

3.14 CONTROL AND EXPANSION JOINTS A. Do not continue horizontal joint reinforcement through control and expansion joints. B. Form control joints with a sheet building paper bond breaker fitted to one side of the hollow contour end of the block unit. Fill the resultant core with grout fill. Rake joint at exposed unit faces for placement of backer rod and sealant. C. Install preformed control joint devices in continuous lengths. Seal butt and corner joints in accordance with manufacturer's instructions. Fused joints spec’d above, std. length is 4’ D. Size control joints in accordance with Section 07900 for sealant performance. E. Provide control joints and expansion joints at locations shown on drawings. 1. Maximum on center spacing for control joints = 20’-0” 2. Maximum on center spacing for vertical expansion joints = 40’-0” a. Provide within 10’-0” on both sides of all corners b. Provide at all offsets and changes in plane in the section of wall perpendicular to primary face of building c. Provide at exterior side of brick masonry penetrations into building interior, i.e. at intersections with curtain walls where significant difference between inside and outside temperatures may be expected d. Carry all vertical expansion joints through the parapet 3. Maximum on center spacing for horizontal expansion joints: a. Provide at locations required by current code requirements. b. Fit brick units seated on shelf angle as required to allow for expansion and to delimit exposed visual joint to normal 3/8” bed joint depth. Fill horizontal expansion joints with elastic sealant color matched to grout

3.15 BUILT-IN WORK A. As work progresses, install built-in metal door frames and other items to be built into the work and furnished under other sections. B. Install built-in items plumb, level, and true to line. C. Bed anchors of metal door and glazed frames in adjacent mortar joints. Fill frame voids solid with grout. 1. Fill adjacent masonry cores with grout minimum 12 inches from framed openings. D. Do not build into masonry construction organic materials that are subject to deterioration.

3.16 TOLERANCES A. Maximum Variation from Alignment of Columns: 1/4 inch. B. Maximum Variation From Unit to Adjacent Unit: 1/16 inch. C. Maximum Variation from Plane of Wall: 1/4 inch in 10 ft and ½ inch in 20 ft or more. D. Maximum Variation from Plumb: 1/4 inch per story non-cumulative; ½ inch in two stories or more. E. Maximum Variation from Level Coursing: 1/8 inch in 3 ft and 1/4 inch in 10 ft; ½ inch in 30 ft. F. Maximum Variation of Joint Thickness: 1/8 inch in 3 ft. G. Maximum Variation from Cross Sectional Thickness of Walls: 1/4 inch. H. Maximum Variation in corresponding bed joints between wythes in cavity walls shall be 1/2 inch.

3.17 CUTTING AND FITTING A. Cut and fit for chases. Coordinate with other sections of work to provide correct size, shape, and location. B. Cut and fit to structural steel framing, as required C. Obtain approval prior to cutting or fitting masonry work not indicated or where appearance or strength of masonry work may be impaired.

3.18 PARGING A. Dampen masonry walls prior to parging.

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B. Scarify each parging coat to ensure full bond to subsequent coat. C. Parge masonry walls in two uniform coats of mortar to a total thickness of 3/4 inch with a steel trowel finish. D. Steel trowel surface smooth and flat with a maximum surface variation of 1/8 inch per foot. E. Strike top edge of parging at 45 degrees. F. Damp core parging for at least 24 hours and protect parging until cured.

3.19 FIELD QUALITY CONTROL A. An independent testing agency will perform field quality control tests. B. Testing Frequency: One set of test for each 5,000 square feet of wall area or portion thereof. C. Concrete Masonry Unit Tests: Test each variety of concrete unit masonry in accordance with ASTM C 140. D. Mortar Tests: Test each type of mortar in accordance with ASTM C 780, testing with same frequency as masonry samples.

3.20 CLEANING A. In-progress cleaning: Clean unit masonry as work progresses by dry brushing to remove mortar fins and smears before tooling joints. B. Clean masonry after mortar is thoroughly set and cured. C. Cleaning shall not mar or otherwise adversely affect appearance of limestone veneer units installed in areas adjacent to areas being cleaned. 1. Comply with directions of Indiana Limestone Institute for protection of limestone veneer from acidic solutions. 2. Protect limestone veneer with plastic membrane across which acidic solution can flow without contacting limestone. 3. Cost for repairs or replacement of limestone damaged in the cleaning of brick shall be the responsibility of the party responsible for damage D. Replace defective mortar. Match adjacent work. E. Before applying cleaning solution, saturate masonry surfaces with water; rinse thoroughly immediately after cleaning. 1. Comply with directions of concrete unit masonry manufacturer and NCMA Tek Bulletin No. 45 for cleaning CMU. F. Clean soiled surfaces with cleaning solution. G. Use non-metallic tools in cleaning operations. H. Final Cleaning: After mortar is thoroughly set and cured, clean exposed masonry as follows: 1. Test cleaning methods on sample wall panel; leave one-half of panel uncleaned for comparison purposes. 2. Protect adjacent surfaces from contact with cleaner. 3. Wet wall surfaces with water before applying cleaners; remove cleaners promptly by rinsing surfaces thoroughly with clear water. 4. Clean brick by bucket-and-brush hand-cleaning described in BIA Technical Notes 20. 5. Clean masonry with a proprietary acidic cleaner applied according to manufacturer's written instructions. 6. Clean concrete masonry by cleaning method indicated in NCMA TEK 8-2A applicable to type of stain on exposed surfaces.

3.21 PROTECTION OF FINISHED WORK A. Without damaging completed work, provide protective boards at exposed external corners which are subject to damage by construction activities.

3.22 SCHEDULES A. Exterior Wall: Refer to drawings for wall types. B. Interior Partitions: Single wythe concrete block units. C. Interior Fire Walls: One and two hour walls of grout filled block masonry with locations identified on Drawings.

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3.23 MASONRY WASTE DISPOSAL A. Waste Disposal as Fill Material: Dispose of clean masonry waste, including excess or soil- contaminated sand, waste mortar, and broken masonry units, by crushing and mixing with fill material as fill is placed. 1. Do not dispose of masonry waste as fill within 18 inches (450 mm) of finished grade. 1. Remove excess clean masonry waste that cannot be used as fill, as described above, and other masonry waste, and legally dispose of off Owner's property.

END OF SECTION 04810

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SECTION 04 90 00 MASONRY RESTORATION AND CLEANING PART 1 - GENERAL 1.1 SUMMARY A. This Section includes restoration and cleaning of brick as follows: 1. Repairing unit masonry, including replacing damaged units at locations indicated on construction drawings. 2. Repointing mortar joints at locations indicated on construction drawings. 3. Removing plant growth. 4. Cleaning exposed clay masonry surfaces. 1.2 REFERENCES A. ACI 530/ASCE 5/TMS 402 - Building Code Requirements for Masonry Structures; American Concrete Institute. B. ACI 530.1/ASCE 6/TMS 602 - Specifications for Masonry Structures; American Concrete Institute. C. IMIAWC (CW) - Cold Weather Masonry Construction Guide -- Specifications and Recommended Practices; International Masonry Industry All-Weather Council. D. IMIAWC (HW) - Recommended Practices & Guide Specifications for Hot Weather Masonry Construction; International Masonry Industry All-Weather Council. E. Comply with US Dept. of Interiors-National Park Service- Historic Preservation Brief #1 “Assessing, Cleaning, and Water Repellant Treatment for Historic Masonry Buildings” and Brief #2 “Repointing Mortar Joints in Historic Masonry Buildings”. 1.3 RELATED SECTIONS A. Section 02 22 30 - Demolition for Remodeling + See notes on drawings regarding salvage B. Section 04 06 50 - Mortar and Masonry Grout C. Section 04 21 00 - Veneer Masonry Units D. Section 04 22 00 - Concrete Unit Masonry E. Section 04 90 20 - Stone Restoration and Cleaning 1.4 DEFINITIONS A. Match Existing: New item or repair shall match the original historic undamaged component exactly in finished dimensions, profile, shape, texture, color and configuration. Use of off-the- shelf or standard components, profiles, colors, and sizes which are similar to existing, but do not match, is not permitted. Mock-up samples are to be reviewed and approved by architect prior to work done. B. Low-Pressure Spray: 50 to 80 psi; 2 to 4 gpm. 1.5 SUBMITTALS A. Product Data: For each type of product indicated. Include recommendations for application and use. B. Samples: For each exposed material required for replacing or repairing existing materials.

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C. Qualification Data for restoration specialists: Work must be performed by a firm having not less than five (5) years successful experience in comparable masonry restoration projects and employing personnel skilled in the restoration processes and operations indicated. D. Submittals for Environmental Performance: 1. Provide product data for all mortar products indicating the percentage of post-industrial ce- ment substitution as a percentage of the full mortar composition by weight. 2. Recycled Content: a. Indicate recycled content; indicate percentage of pre-consumer and post- b. Indicate relative dollar value of recycled content product to total dollar c. If recycled content product is part of an assembly, indicate the percentage d. If recycled content product is part of an assembly, indicate relative dollar 3. Local/Regional Materials: a. Sourcing location(s): Indicate location of extraction, harvesting, and reco- b. Manufacturing location(s): Indicate location of manufacturing facility; in c. Product Value: Indicate dollar value of product containing local/regional d. Product Component(s) Value: Where product components are sourced or 1.6 QUALITY ASSURANCE A. Comply with provisions of ACI 530/ASCE 5/TMS 402 and ACI 530.1/ASCE 6/TMS 602, except where exceeded by requirements of the contract documents. B. Restorer: Company specializing in masonry restoration with minimum three years of documented experience. C. Preconstruction Testing Service: Engage a qualified independent testing agency to site test the following upon delivery to the site: 1. Replacement Brick: Test according to ASTM C 67 for compressive strength, 24-hour cold-water absorption, 5-hour boil absorption, saturation coefficient, and initial rate of absorption (suction). a. Test reports shall delineate the following criteria with associated results meeting minimum and maximum values as stipulated below: 1) Efflorescence Rating: “No Efflorescence” 2) Minimum Compression Strengths (SW): a) Individual Brick: 2000 psi b) Average of 5 brick: 3000 psi 3) Maximum Water Absorptions: a) 5 Hour Boil: 1) Individual brick: 20.0% 2) Average of 5 brick: 17.0% 4) Maximum Saturation Coefficients:

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a) Individual Brick: .80 (waivers not allowed) b) Average of 5 brick: .78 (waivers not allowed) The Owner may choose to approve a brick that does not comply with the maximum saturation coefficients above but complies with ASTM C-216's “absorptive alter- nate”. The sample brick must meet the compressive strength requirements listed above and any of the five samples used for the 24 hr. cold water submersion test does not have the absorption exceeding eight (8%) percent by weight. The Owner has the sole discretion to accept brick based on the bricks performance according to this alternate standard. If the Owner, in its sole discretion, rejects a brick based upon this “absorption alternate” the brick proposed MUST meet the ASTM criteria outlined in Section 04 01 20 (1.4,1, a, 1 through 4). 5) Maximum Permitted Initial Rate of Absorption: a) 30 grams/min/30si tested in accordance with ASTM C-67; 2. Existing Brick: Test according to ASTM C 67 for compressive strength, 24-hour cold- water absorption, 5-hour boil absorption, saturation coefficient, and initial rate of absorption (suction). Carefully remove from locations designated by Architect. D. Submit initial test report submittal from the brick manufacturer. Test report must be for the product manufactured in the most recent 12-month period. Supplied by Manufacturer. E. Final test report submittal for actual product manufactured for specific project. Supplied by Manufacturer. F. All brick provided and installed for the project shall be free of efflorescence. G. Masonry units, upon delivery to the project site, shall not be stored in direct contact with the ground. H. Required test data shall be submitted and approved by the Architect and the Owner before brick is delivered. I. Mock-ups: Prepare mock-ups of restoration and cleaning as follows to demonstrate aesthetic effects and qualities of materials and execution. 1. Prepare one 6’x8’ sample panel for repointed masonry and replacement masonry units. Sample panel shall demonstrate quality of materials and workmanship, joint tooling, joint thickness, and mortar color. Actual construction repointing shall match the approved samples in all aspects. Mock-up shall be erected on site prior to the start of masonry work. Mock-up(s) shall include entire wall system construction with all components and sub-assemblies including any stone or brick accent features. If mock ups are provided on the building, a pre determination by the architect is required of a discreet area to be tested. 2. Clean and area approximately 25 sq. ft. in area for each type of masonry and surface condition. 3. The approved mock-up panel will establish the basis for acceptable quality of the masonry work. Additional mock-ups may be required, at Contractor expense, until quality of finished product is approved by the Owner and the Architect. 4. The mock-up panel is to be constructed on site, at a location so as to allow it to remain in place until the completion of all masonry work for the project. If it becomes necessary to move the mock-up panel, the Contractor shall do so in a manner to maintain the structural integrity of the panel, causing it no damage, and shall pay for all associated costs of the move.

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5. The mock up panel shall be protected sufficiently to prohibit the panel's degradation due to weather. 1.7 DELIVERY, STORAGE, AND HANDLING A. Deliver masonry neatly stacked and tied on pallets. Store clear of ground with adequate wa- terproof covering, in a secured area. B. Store restoration cleaner materials in manufacturer's packaging. 1.8 ENVIRONMENTAL REQUIREMENTS A. Cold Weather Requirements: Comply with IMIAWC Cold Weather Masonry Construction Guide. B. Hot Weather Requirements: Comply with IMIAWC Recommended Practices and Guide Speci- fications for Hot Weather Masonry Construction. 1.9 PROJECT CONDITIONS A. Perform repointing before cleaning masonry surfaces.

PART 2 - PRODUCTS 2.1 MORTAR MATERIALS A. Pointing Mortar for Brick and stone features: 1. Historic Mix: 6 parts sand + 3 parts lime + 1 parts Portland cement. In all cases, the compressive strength of the restoration mortar shall be less than that of the brick, granite, stone or terra cotta. Third party testing of the brick composition and properties and existing mortar composition is required to verify specific mortar mix to prevent future damage to the masonry systems. Reports and results are to be submitted to the architect at least 30 days prior to any new work. 2. Mortar Components: a. Sand shall conform to ASTM C-144, with appropriate size and color to match existing. b. Lime shall conform to ASTM C-207, Type S, Hydrated Lime for masonry purposes. The use of quicklime is not recommended. c. Cement shall conform to ASTM C-150 Type II white Portland cement. This should not contain more than .60 percent alkali (to prevent efflorescence). 3. Add mortar pigments to produce mortar colors required to match existing areas where repairs and tuck-pointing occurs. 4. Mortar mix, color, and joint size are critical historic issues. The mortar mix described herin is not to be modified without authorization from the Architect. Mortar color and texture, joint size and tooling are to match original, and specific to the areas of work being done (as some areas may have different colors of materials from other areas). 2.2 MANUFACTURERS A. In other Part 2 articles where titles below introduce lists, the following requirements apply for product selection: 1. Available Products: Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the products specified. 2. Products: Subject to compliance with requirements, provide one of the products specified.

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3. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the manufacturers specified. 4. Manufacturers: Subject to compliance with requirements, provide products by the manufacturers specified. 2.3 MASONRY MATERIALS A. Salvaged Brick and Stone: refer to drawings for areas of removal and salvage. Safely store and secure for reuse. B. Brick: 04 21 00 - Veneer Masonry Units C. Block: 04 22 00 - Concrete Unit Masonry D. Face Brick and Accessories: Provide face brick and accessories, including specially molded, ground, cut, or sawed shapes. a. Provide units with colors, surface texture, size, and shape to match existing brickwork and with physical properties not less than those of selected existing units. b. Existing Brick: 1) Color: To be determined from salvaged brick samples 2) Size: To be determined from salvaged brick samples c. Custom Brick: 1) Brick produced at Belden Brick Co. Belden Brick Company, 700 Tuscarawas St W., Canton, Ohio 44702. Phone 330-456-0031 2) Hand cut each brick on wet saw to create matching size of original. Tumbled edges if required to match existing. d. Mock up to be approved by Owner and Architect utilizing mix as specified prior to ordering brick. E. Building Brick: ASTM C 62; Grade SW, MW, or NW, except Grade SW where in contact with earth; of same vertical dimension as face brick; for masonry work concealed from view. F. Portland Cement: ASTM C 150, Type I. 1. Provide white cement containing not more than 0.03 percent total alkali when tested according to ASTM C 91. G. Hydrated Lime: ASTM C 207, Type S. H. Mortar Sand: ASTM C 144, unless otherwise indicated. 1. Color: Provide natural sand; of color necessary to produce required mortar color. 2. For pointing mortar, provide sand with rounded edges. 3. Match size, texture, and gradation of existing mortar sand as closely as possible. Blend several sands, if necessary, to achieve suitable match. I. Mortar Pigments: Natural and synthetic iron oxides, compounded for mortar mixes. Existing mortar varies in color. Adjust color for areas of tuckpointing J. Water: Potable, free of oils, acids, alkalis and organic matter. 2.4 MASONRY EMBEDDED FLASHING

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A. Flexible Sheet Flashing: Use high density, 40 mils thick cross laminated polyethylene film. Material to be fully adhering, self – adhering, through wall flashing membrane, 36 inches wide with silicone coated release paper. 2.5 MASONRY CAVITY DRAINAGE, WEEP HOLES, AND VENTS A. Weeps and Vents: Use injection molded polyvinyl chloride grilles, insect resistant in off-set “T”. Color to match mortar. 2.6 CLEANING MATERIALS A. Water for Cleaning: Potable, free of oils, acids, alkalis, salts and organic matter. B. Environmental Protection System: Use a dry absorbent compound for spillage and to dike/contain and collect wash off residue for safer disposal and to address local environmental requirements. C. Acidic Cleaner: Manufacturer's standard acidic masonry restoration cleaner composed of hydrofluoric acid blended with other acids, detergents, wetting agents, and inhibitors. Refer to: US Dept. of Interiors –National Park Service Historic Preservation Brief #1 “Assessing, Cleaning, and Water Repellent Treatments for Historic Masonry Buildings”, and Brief #2 “Repointing Mortar Joints in Historic Masonry Buildings”. 1. Products: a. Diedrich Technologies, Inc.: 101G Masonry Restorer b. Price Research, Ltd.; Price Restoration Cleaner c. ProSoCo; Sure Klean 1028 Restoration Cleaner

D. Cleaner for existing masonry to receive new masonry stain: 1. Low-pressure spray existing masonry to remove existing surface staining and debris 2. Products: a. If penetrating silicone sealer is present on surface of existing masonry, clean surface with Prosoco Sure Klean Dicone NC9 b. If a film building sealer product is present on surface of existing masonry, strip surface with Prosoco Fast acting Stripper or Prosoco Safestrip E. Masonry Patching Compound: Factory-mixed cementitious product that is custom manufactured for patching masonry, is vapor- and water permeable, exhibits low shrinkage, and develops high bond strength to all types of masonry. 1. Formulate patching compound to match masonry units being patched. 2. Products: a. Cathedral Stone Products, Inc.; Jahn Restoration Mortar. b. Edison Coatings, Inc.; Custom System 45. F. Liquid Strippable Masking Agent: Manufacturer's standard liquid, film-forming, strippable masking material for protecting glass, metal, and polished stone surfaces from damaging effects of acidic and alkaline masonry cleaners. 1. Products: a. American Building Restoration Products, Inc.; LM 130 Acid Shield. b. Diedrich Technologies Inc.; Diedrich Acid Guard.

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c. Price Research, Ltd.; Price Mask. d. ProSoCo; Sure Klean Strippable Masking. 2.7 MIXES A. Mortar Mixes: Measure cementitious materials and sand in a dry condition by volume or equivalent weight. Mix materials in a clean, mechanical batch mixer. 1. Mixing Pointing Mortar: Thoroughly mix cementitious materials and sand together before adding any water. Then mix again adding only enough water to produce a damp, unworkable mix that will retain its form when pressed into a ball. Maintain mortar in this dampened condition for 15 to 30 minutes. Add remaining water in small portions until mortar reaches desired consistency. Use mortar within one hour of final mixing; do not re-temper or use partially hardened material. 2. Mortar Pigments: Do not exceed a pigment-to-cement ratio of 1:10 by weight. B. Do not use admixtures of any kind in mortar, unless otherwise indicated. 1. Do not use calcium chloride in mortar or grout. C. Pointing Mortar for Brick: Mortar proportions are to be priced out as identified in mortar analysis. Mortar analysis is to be conducted by Soils and Materials Engineers of Grand Rapids, MI, or other qualified testing agency and information on exact mortar mix is to be by the contractor at least 30 days prior to any work. D. Delete subparagraph below if not required. 1. Add mortar pigments to produce mortar colors required. 2. Mortar mix, color, and joint size are critical historic issues. The mortar mix described herein is not to be modified without authorization from the Architect. Mortar color and texture, joint size and tooling are to match original. PART 3 - EXECUTION 3.1 EXAMINATION Verify that surfaces to be cleaned are ready for work of this section. 3.2 PREPARATION A. Carefully remove and store fixtures, fittings, finishing hardware, accessories. B. Close off areas, landscaping, materials, and surfaces not receiving work of this section to protect from damage. C. Construct dust proof partitions to close off occupied areas. D. Protect elements surrounding the work of this section from damage and disfigurement. E. Immediately remove stains, efflorescence, or other excess resulting from the work of this section. F. Protect roof membrane and flashings from damage. Lay 1/2 inch plywood on roof surfaces over full extent of work area and traffic route. G. Protect doors, windows, hardware, woodwork, metalwork and other construction in place from cleaning agents. H. Provide sand dams to divert flowing water to exterior. I. Do not perform work in in-climate weather or high wind conditions

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3.3 PROTECTION A. Protect persons, motor vehicles, surrounding surfaces of building being restored, building site, plants, and surrounding buildings from harm resulting from masonry restoration work. B. Prevent chemical cleaning solutions from coming into contact with pedestrians, motor vehicles, landscaping, buildings, and other surfaces that could be harmed by such contact. 1. Cover adjacent surfaces with materials that resist chemical cleaners used unless chemical cleaners will not damage surfaces. Use materials that contain only waterproof, UV-resistant adhesives. When no longer needed, promptly remove masking to prevent adhesive staining. 2. Keep wall wet below area being cleaned to prevent streaking from runoff. 3.4 MASONRY REMOVAL, REPLACEMENT, AND PATCHING A. At locations indicated or field determined by architect, remove masonry units that are damaged, spalled, or deteriorated. Carefully demolish or remove entire units from joint to joint, without damaging surrounding masonry, in a manner that permits replacement with full-size units. B. Support and protect remaining masonry that surrounds removal area. Maintain flashing, reinforcement, lintels, and adjoining construction in an undamaged condition. C. Remove in an undamaged condition as many whole bricks as possible. 1. Remove mortar, loose particles, and soil from brick by cleaning with hand chisels, brushes, and water. D. Clean bricks surrounding removal areas by removing mortar, dust, and loose particles. E. Brick Replacement: 1. Install replacement brick into bonding and coursing pattern of existing brick. If cutting is required, use a motor-driven saw to cut masonry with clean, sharp, unchipped edges. Tumble edges if required to match adjacent materials. 2. Lay brick with completely filled bed, head, and collar joints. Butter ends with sufficient mortar to fill head joints and shove into place. Wet both replacement and surrounding bricks that have ASTM C 67 initial rates of absorption (suction) of more than 30 g/30 sq. in. per min. Maintain joint width to match existing joints. a. Exposed mortar joints to match joints of surrounding existing brickwork. b. Refer to structural for additional requirements and materials required for anchoring new brickwork to existing conditions. 3.5 REBUILDING A. Cut out damaged and deteriorated masonry with care in a manner to prevent damage to any adjacent remaining materials. B. Support structure as necessary in advance of cutting out units. C. Cut away loose or unsound adjoining masonry as directed, and as required for stabilizing construction. D. Build in new units following procedures for new work specified in Division 4. E. Mortar Mix: Colored and proportioned to match existing work. See Mock-up instructions. F. Ensure that anchors are correctly located and built in. G. Install built in masonry work to match and align with existing, with joints and coursing true and

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level, faces plumb and in line. Build in all openings, accessories and fittings. H. Establish high priority areas for reuse of salvaged brick and other areas for use of new brick units, so that appearance is consistent with historical precedent. Confirm locations with architect prior to installation. I. Re-build is to utilize tooth-in methods with no exposed cut sides. 3.6 REPOINTING MASONRY A. Rake out and repoint mortar joints as follows: 1. Remove mortar from joints to depth of 2-1/2 times joint width, but not less than 1/2 inch or not less than that required to expose sound, unweathered mortar. Remove mortar from masonry surfaces within raked-out joints to provide reveals with square backs and to expose masonry for contact with pointing mortar. 2. Cut out mortar by hand with chisel and mallet. 3. Use power tools only after test cuts determine no damage to masonry units will result. - Do not damage masonry units. 4. Cut out center of mortar bed joints using angle grinders with diamond-impregnated metal blades. Do not spall edges of brick units or wide joints. Remove remaining mortar by hand with chisel and mallet. Strictly adhere to written quality-control program. Quality- control program shall include provisions for demonstrating ability of operators to use tools without damaging masonry, supervising performance, and preventing damage due to worker fatigue. 5. When cutting is complete, remove dust and loose material by brushing. 6. Rinse masonry-joint surfaces with water to remove dust and mortar particles. Time rinsing application so, at time of pointing, joint surfaces are damp but free of standing water. If rinse water dries, dampen masonry-joint surfaces before pointing. 7. Install restoration masonry anchors, as required prior to pointing mortar. 8. Pre-moisten joint and bricks and apply mortar specified in Division 4. Pack tightly in maximum 1/4 inch layers. Form a smooth, compact tooled joint to match existing profile. 9. Apply pointing mortar first to areas where existing mortar was removed to depths greater than surrounding areas. Apply in layers not greater than 3/8 inch. Fully compact each layer thoroughly and allow it to become thumbprint hard before applying next layer. Where existing bricks have worn or rounded edges, slightly recess finished mortar surface below face of masonry to avoid widened joint faces. 10. When mortar is thumbprint hard, tool joints to match original appearance of joints. Remove excess mortar from edge of joint by brushing. B. Cure mortar by maintaining in thoroughly damp condition for at least 72 hours including weekends and holidays. 1. Acceptable curing methods include covering with wet burlap and plastic sheeting, periodic hand misting, and periodic mist spraying using system of pipes, mist heads, and timers. 3.7 CLEANING A. The mason shall keep brick clean of excess mortar droppings, smears, and stains while laying brick. Dry brush clean or use clean water as necessary. B. Proceed with cleaning in an orderly manner; work from top to bottom of each scaffold width and from one end of each elevation to the other.

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C. Use only those cleaning methods indicated for each masonry material and location, as approved by the brick manufacturer. Such approval shall be obtained in writing and a copy provided to the Owner. 1. Do not use wire brushes. 2. Use spray equipment that provides controlled application at volume and pressure indicated, measured at spray tip. 3. For chemical cleaner spray application, use low-pressure tank or chemical pump suitable for chemical cleaner indicated, equipped with cone-shaped spray tip. 4. For water spray application, use fan-shaped spray tip that disperses water at an angle of 25 to 50 degrees. 5. No acid based cleaners shall be used. 6. Protect surrounding materials, equipment, plants, and other items. D. Removing Plant Growth: Completely remove plant, moss, and shrub growth from masonry surfaces. Carefully remove plants, creepers, and vegetation by cutting at roots and allowing to dry as long as possible before removal. Remove loose soil and debris from open masonry joints to whatever depth they occur. E. Chemical Cleaner Application Methods: Apply chemical cleaners to masonry surfaces to comply with chemical cleaner manufacturer's written instructions; use brush or spray application methods, at Contractor's option. Do not spray apply at pressures exceeding 80 psi. Do not allow chemicals to remain on surface for periods longer than those indicated or recommended by manufacturer. 3.8 FINAL CLEANING A. After mortar has fully hardened, thoroughly clean exposed masonry surfaces of excess mortar and foreign matter; use wood scrapers, stiff-nylon or -fiber brushes, and clean water, spray applied at low pressure. 1. Do not use metal scrapers or brushes. 2. Do not use acidic or alkaline cleaners.

END OF SECTION 04 90 00

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SECTION 07 01 91

JOINT SEALANTS- EXTERIOR REPLACEMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes replacement of exterior weatherproofing sealants.

1.2 RELATED REQUIREMENTS 1. Division 00 and 01 by Construction Manager 2. Section 02 22 30 Demolition for Remodeling 3. Section 02 41 19 Selective Demolition 4. Section 04 06 50 Mortar and Masonry Grout 5. Section 04 72 00 Cast Stone 6. Section 04 21 00 Veneer Masonry Unit 7. Section 04 81 00 Unit Masonry Assemblies 8. Section 04 90 00 Masonry Restoration and Cleaning 9. Section 07 92 00 Joint Sealants

1.3 REFERENCES

A. References, General: Versions of the following cited standards current as of the date of issue of the project apply to the Work of this Section.

B. ASTM International (ASTM): www.astm.org:

1. ASTM C 510 - Standard Test Method for Staining and Color Change of Single- or Multicomponent Joint Sealants. 2. ASTM C 661 - Standard Test Method for Indentation Hardness of Elastomeric Type Sealants by Means of a Durometer. 3. ASTM C 719 - Standard Test Method for Adhesion and Cohesion of Elastomeric Joint Sealants Under Cyclic Movement (Hockman Cycle). 4. ASTM C 794 - Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants 5. ASTM C 920 - Specification for Elastomeric Joint Sealants. 6. ASTM C 1193 - Guide for Use of Joint Sealants. 7. ASTM C 1247 - Standard Test Method for Durability of Sealants Exposed to Continuous Immersion in Liquids. 8. ASTM C 1248 - Test Method for Staining of Porous Substrate by Joint Sealants. 9. ASTM C 1311 - Specification for Solvent Release Sealants. 10. ASTM C 1330 - Cylindrical Sealant Backing for Use with Cold Liquid Applied Sealants. 11. ASTM C 1521 - Standard Practice for Evaluating Adhesion of Installed Weatherproofing Sealant Joints. 12. ASTM D 412 - Test Methods for Vulcanized Rubber and Thermoplastic Elastomers— Tension. 13. ASTM D 624 - Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers. 14. ASTM D 2203 - Standard Test Method for Staining from Sealants. 15. ASTM D 2240 - Test Method for Rubber Property - Durometer Hardness.

C. Sealant, Waterproofing, and Restoration Institute (SWRI): www.swrionline.org:

1. SWRI Validation Program.

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1.4 ADMINISTRATIVE REQUIREMENTS

A. Coordination: Coordinate installation of joint sealants with cleaning of joint sealant substrates and other operations that may impact installation or finished joint sealant work. Coordinate joint sealants with masonry stain work.

B. Preinstallation Conference: Conduct conference at Project Site.

1.5 PRECONSTRUCTION TESTING

A. Preconstruction Field-Adhesion Testing: Before installing sealants, field test their adhesion to Project joint substrates as follows:

1. Test Method: Test joint sealants according to Method A, Field-Applied Sealant Joint Hand Pull Tab, in Appendix X1 in ASTM C 1193 or Method A, Tail Procedure, in ASTM C 1521.

1.6 ACTION SUBMITTALS

A. Product Data: For each type of joint sealant product specified, including:

1. Preparation instructions and recommendations.

B. Samples for Color Selection: For each joint sealant type.

C. Samples for Verification: For each exterior joint sealant product, for each color selected.

1.7 INFORMATIONAL SUBMITTALS

A. Qualification Data: For manufacturer and qualified applicator.

B. Preconstruction field-adhesion test reports.

C. Field quality control adhesion test reports.

D. Warranty: Sample of unexecuted manufacturer and installer special warranties.

1.8 QUALITY ASSURANCE

A. Manufacturer: Company specializing in manufacturing products specified in this section with minimum ten years documented experience with record of successful product in-service use.

1. Single Source Responsibility: Provide exterior joint sealants by a single manufacturer responsible for testing of Project substrates to verify compatibility and adhesion of joint sealants.

B. Installer Qualifications: A firm with minimum three years of experience installation of specified products in successful use on similar projects, including a full-time on-site supervisor with a minimum of three years of experience installing similar work, able to communicate with a contractor, architect, and employees.

1.9 DELIVERY, STORAGE AND HANDLING

A. Accept materials on site in manufacturer's unopened original packaging.

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B. Store primers and sealants in dry location with ambient temperature range of 60 to 80 deg. F (15 to 27deg. C).

1.10 ENVIRONMENTAL REQUIREMENTS

A. Do not install joint sealants during inclement weather or when such conditions are expected. Allow wet surfaces to dry.

1. Do not install primers or sealants when atmospheric temperatures or joint surface temperatures are less than 40 deg. F (4 deg. C). 2. Do not install sealant when temperature is less than 5 deg F (3 deg C) below dew point.

1.11 SCHEDULING

A. Schedule work so waterproofing, water repellents and preservative finishes are installed after sealants, unless sealant manufacturer approves otherwise in writing.

1.12 FIELD CONDITIONS

A. Hazardous Materials: Verify with Owner whether testing has indicated that materials to be removed or rehabilitated may contain hazardous materials. Asbestos Containing Material testing and report available from Owner.

1. Owner will remove hazardous materials prior to start of work. 2. Do not disturb hazardous materials or items suspected of containing hazardous materials except as part of remediation processes.

1.13 WARRANTY

A. Special Manufacturer's Warranty: Manufacturer's standard form in which joint sealant manufacturer agrees to furnish joint sealants to repair or replace those that demonstrate deterioration or adhesive or cohesive failure under normal use within warranty period specified.

1. Warranty Period for Silicone Sealants: Ten years date of Substantial Completion.

B. Special Installer's Warranty: Original statement on Installer's letterhead in which Installer agrees to repair or replace joint sealants that demonstrate deterioration or failure within warranty period specified.

1. Warranty Period: Two years from date of Substantial Completion.

C. Special warranties specified in this article exclude deterioration or failure of joint sealants from the following:

1. Movement of the structure caused by structural settlement or stresses on the sealant exceeding sealant manufacturer's written specifications for sealant elongation and compression. 2. Disintegration of joint substrates exceeding design specifications. 3. Mechanical damage caused by outside agents. 4. Changes in sealant appearance caused by accumulation of dirt or other atmospheric contaminants.

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PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Basis-of-Design: Tremco, Inc., Beechwood OH; (866) 321-6357.

B. Substitutions: See Section 01 60 00 – Product Requirements.

2.2 MATERIALS, GENERAL

A. Compatibility: Provide joint sealants and accessory materials that are compatible with one another, and with adjacent materials, as demonstrated by sealant manufacturer using ASTM C1087 testing and related experience.

B. Joint Sealant Standard: Comply with ASTM C 920 and other specified requirements for each joint sealant.

C. Stain Test Characteristics: Where sealants are required to be nonstaining, provide sealants tested per ASTM C 1248 as non-staining on porous joint substrates specified.

2.3 URETHANE JOINT SEALANTS

A. Single-Component, Nonsag, Moisture-Cure, Polyurethane Hybrid Joint Sealant: ASTM C 920, Type S, Grade NS, Class 50, Use NT; Greenguard certified.

1. Basis of Design Product: Tremco, Inc., Dymonic 100. 2. Volatile Organic Compound (VOC) Content: 40 g/L maximum. 3. Tensile Strength ASTM D412: 350 to 450 psi 4. Percent Elongation ASTM D412: 800 to 900% 5. Modulus at 100% ASTM D412: 75 to 85 psi 6. Tear Strength ASTM D412: 65 to 75 psi 7. Smoke Development ASTM E84: 5 8. Color: As selected by Architect from manufacturer's standard line of not less than 20 colors.

B. Single-Component, Nonsag, Moisture-Cure, Polyurethane Hybrid Joint Sealant: ASTM C 920, Type S, Grade NS, Class 35, Use NT; Greenguard certified.

1. Basis of Design Product: Tremco, Inc., Dymonic FC. 2. Volatile Organic Compound (VOC) Content: 10 g/L maximum. 3. Color: As selected by Architect from manufacturer's standard line of not less than 15 colors.

2.4 JOINT SEALANT ACCESSORIES

A. Cylindrical Sealant Backing: ASTM C 1330, Type B non-absorbent, bi-cellular material with surface skin, or Type O open-cell polyurethane, as recommended by sealant manufacturer for application.

B. Expansion Joint Filler: Basis of Design Willseal 150. Preformed, pre-compressed polyurethane foam system impregnated with an acrylic based, flame-resistant and weatherproofing sealant. Approved for use as secondary seal application and compatible with sealant.

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C. Bond Breaker Tape: Polymer tape compatible with joint sealant and adjacent materials and recommended by sealant manufacturer.

D. Joint Substrate Primers: Substrate primer recommended by sealant manufacturer for application.

E. Cleaners: Chemical cleaners acceptable to joint sealant manufacturer.

F. Masking tape: Non-staining, non-absorbent tape product compatible with joint sealants and adjacent joint surfaces.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examination of Existing Joint Sealants: Examine existing joint sealants indicated to be replaced. Examine joints for compliance with requirements for joint configuration, installation tolerances, condition of joint substrate, and other conditions affecting joint-sealant performance.

B. Submit report indicating conditions that cannot be corrected to comply with joint sealant manufacturer's recommendations as part of the specified joint replacement or rehabilitation. Proceed with work once non-complying conditions are corrected.

3.2 JOINT PREPARATION

A. Removal of Failed Joint Sealant Materials: Cut out and remove joint materials and associated backing materials as indicated on drawings.

B. Surface Cleaning of Joint Substrates: Clean joints thoroughly immediately before installing joint sealants. Remove foreign material from joint substrates that could interfere with adhesion of joint sealant, including dust, paints (except for permanent, protective coatings tested and approved for sealant adhesion and compatibility by sealant manufacturer), old joint sealants, oil, grease, waterproofing, water repellents, water, surface dirt, and frost.

1. Clean porous joint substrate surfaces by brushing, grinding, mechanical abrading, or a combination of these methods in addition to solvent cleaning to produce a clean, sound substrate capable of developing optimum bond with joint sealants. Remove loose particles remaining after cleaning operations above by vacuuming or blowing out joints with oil-free compressed air. Remove laitance and form-release agents from concrete. 2. Clean porous and nonporous joint substrate surfaces with chemical cleaners or other means that do not stain, harm substrates, or leave residues capable of interfering with adhesion of joint sealants. 3. Coordinate joint cleaning with masonry stain work. Maintain consistent masonry stain appearance.

C. Masking: Mask adjacent surfaces to prevent staining or damage by contact with sealant or primer.

D. Joint Backing: Select joint backing materials recommended by sealant manufacturer as compatible with sealant and adjacent materials. Install backing material at depth required to produce profile of joint sealant allowing optimal sealant movement.

1. Install joint backing to maintain the following joint ratios:

a. Joints up to 1/2 inch (13 mm) wide: 1:1 width to depth ratio.

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b. Joints greater than 1/2 inch (13 mm) wide: 2:1 width to depth ratio; maximum 1/2 inch (13 mm) joint depth.

2. Install bond breaker tape over substrates when sealant backings are not used.

3.3 INSTALLATION OF JOINT SEALANTS

A. Sealant and Primer Installation Standard: Comply with ASTM C 1193 and manufacturer's written instructions.

B. Joint Priming: Prime joint substrates when recommended by sealant manufacturer or when indicated by preconstruction testing or experience. Apply recommended primer using sealant manufacturer's recommended application techniques.

C. Joint Sealant Application: Install sealants using methods recommended by sealant manufacturer, in depths recommended for application. Apply in continuous operation from bottom to top of joint vertically and horizontally in a single direction. Apply using adequate pressure to fill and seal joint width.

1. Tool sealants immediately with appropriately shaped tool to force sealants against joint backing and joint substrates, eliminating voids and ensuring full contact. 2. Install sealant free of air pockets, foreign embedded matter, ridges, and sags. 3. Tool exposed joint surface concave using tooling agents approved by sealant manufacturer for application.

D. Cleaning: Remove excess sealant using materials and methods approved by sealant manufacturer that will not damage joint substrate materials.

1. Remove masking tape immediately after tooling joint without disturbing seal. 2. Remove excess sealant from surfaces while still uncured.

3.4 FIELD QUALITY CONTROL

A. Field-Adhesion Testing: Perform adhesion tests in accordance with manufacturer’s instructions and with ASTM C 1193, Method A.

1. Perform 5 tests for the first 1000 feet (300 m) of joint length for each kind of sealant and joint substrate, and one test for each 1000 feet (300 m) of joint length thereafter or 1 test per each floor per building elevation, minimum. 2. For sealant applied between dissimilar materials, test both sides of joint.

B. Remove sealants failing adhesion test, clean substrates, reapply sealants, and re-test. Test adjacent sealants to failed sealants.

C. Submit report of field adhesion testing to Architect indicating tests, locations, dates, results, and remedial actions taken.

3.5 EXTERIOR JOINT-SEALANT SCHEDULE

A. Exterior movement joints in concrete unit masonry and concrete veneer units.

1. Joint Sealant: Basis of Design- Tremco Dymonic FC. Single-component, nonsag, moisture-cure, polyurethane hybrid joint sealant. ASTM C920, Type S, Grade NS, Class 35, Use NT. 2. Joint-Sealant Color: As selected by Architect from manufacturer's standard colors.

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B. Exterior movement joints in cast stone at locations including parapet caps and window sills.

1. Joint Sealant: Basis of Design- Tremco Dymonic 100. Single-component, nonsag, moisture-cure, polyurethane hybrid joint sealant. ASTM C920, Type S, Grade NS, Class 50, Use NT. 2. Joint-Sealant Color: As selected by Architect from manufacturer's standard colors.

C. Exterior joints between different materials listed above.

1. Joint Sealant: Basis of Design- Tremco Dymonic FC. Single-component, nonsag, moisture-cure, polyurethane hybrid joint sealant. ASTM C920, Type S, Grade NS, Class 35, Use NT. 2. Joint-Sealant Color: As selected by Architect from manufacturer's standard colors.

END OF SECTION

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SECTION 07 92 00 JOINT SEALERS

PART 1 GENERAL

1.01 SECTION INCLUDES A. Sealants and joint backing. B. Precompressed foam sealers. C. Hollow gaskets.

1.02 RELATED SECTIONS A. Section 07 84 00 - Firestopping and 15145 - Plumbing Piping: Firestopping sealants. B. Section 08 80 00 - Glazing: Glazing sealants and accessories. C. Section 09 21 16 - Gypsum Board Assemblies: Acoustic sealant.

1.03 REFERENCES A. ASTM C 834 - Standard Specification for Latex Sealants. B. ASTM C 919 - Standard Practice for Use of Sealants in Acoustical Applications. C. ASTM C 920 - Standard Specification for Elastomeric Joint Sealants. D. ASTM C 1193 - Standard Guide for Use of Joint Sealants. E. ASTM D 1056 - Standard Specification for Flexible Cellular Materials - Sponge or Expanded Rubber. F. ASTM D 1565 - Standard Specification for Flexible Cellular Materials--Vinyl Chloride Polymers and Copolymers (Open-Cell Foam). G. ASTM D 1667 - Standard Specification for Flexible Cellular Materials--Vinyl Chloride Polymers and Copolymers (Closed-Cell Foam). H. ASTM D 2628 - Standard Specification for Preformed Polychloroprene Elastomeric Joint Seals for concrete Pavements.

1.04 DEFINITIONS A. Substrates: M-type substrates: Concrete, concrete masonry units, brick, mortar, natural stone. The term "masonry" means brick, stone, and concrete masonry work. B. Through-Penetration Firestop: Rated assembly of materials that restore walls and floors breached by mechanical, electrical, and structural services such as pipes, conduits, ducts and wiring which penetrate a specified fire-rated condition/construction.

1.05 SUBMITTALS A. See Division 1 - Administrative Requirements, for submittal procedures. B. Product Data: Provide data indicating sealant chemical characteristics. C. Manufacturer's Installation Instructions: Indicate special procedures, surface preparation, and perimeter conditions requiring special attention.

1.06 QUALITY ASSURANCE A. Maintain one copy of each referenced document covering installation requirements on site. B. Manufacturer Qualifications: Company specializing in manufacturing the Products specified in this section with minimum three years documented experience. C. Applicator Qualifications: Company specializing in performing the work of this section with minimum three years experience and approved by manufacturer. 1. Work to be performed by contractor whose main line of work includes the "calking and sealing" of buildings. 2. Execution of 75 sealer installations of similar size and scope. 3. Similar installations completed within 6 months before start of this project. 4. Lead mechanic assigned from among those experienced on previous similar projects

1.07 DELIVERY, STORAGE, AND HANDLING

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A. Deliver materials in original containers or bundles with labels showing manufacturer, product name or designation, color, shelf life, and installation instructions.

1.08 ENVIRONMENTAL REQUIREMENTS A. Maintain temperature and humidity recommended by the sealant manufacturer during and after installation. B. Do not install sealers if any of the following conditions exist: 1. Air or substrate temperature exceeds the range recommended by sealer manufacturer or is below 40 degrees F. 2. Substrate is wet, damp, or covered with snow, ice, or frost. C. Dimensional Limitations: Do not install sealers if joint dimensions are less than or greater than that recommended by sealer manufacturer; notify the architect and get sealer manufacturer's recommendations for alternative procedures.

1.09 COORDINATION A. Coordinate the work with all sections referencing this section.

1.10 WARRANTY A. See Section 01780 - Closeout Submittals, for additional warranty requirements. B. Correct defective work within a five year period after Date of Substantial Completion. C. Warranty: Include coverage for installed sealants and accessories which fail to achieve airtight seal and watertight seal, exhibit loss of adhesion or cohesion, or do not cure. 1. Submit a written warranty signed by installer guaranteeing to correct failures in sealer work that occur after substantial completion, without reducing or otherwise limiting any other rights to correction which the owner may have under the contract documents. Failure is defined as failure to remain weathertight due to faulty materials or workmanship. Correction is limited to replacement of sealers.

PART 2 PRODUCTS

2.01 SEALANTS A. MATERIALS - GENERAL 1. General: Provide only products which are recommended and approved by their manufacturer for the specific use to which they are put and which comply with all requirements of the contract documents. a. For each generic product, use only materials from one manufacturer. b. Provide only materials which are compatible with each other and with joint substrates. c. Colors of exposed sealers: As selected by the architect from manufacturer's standard colors. 2. Products: Provide one of the products listed for each generic type provided they comply with requirements of the contract documents. B. ELASTOMERIC SEALANTS 1. Elastomeric Sealants - General: Chemically curing elastomeric sealants of types indicated, complying with ASTM C 920, including specific Type, Grade, Class, and Uses indicated, as well as all other requirements specified. a. For M-type substrates: Comply with requirements for Use M. 2. Mildew-Resistant Silicone Sealant: One-part, Type S, Grade NS, Class 25, Use NT, formulated with fungicide, for interior use on nonporous substrates. a. Products: 1) "Dow Corning 786"; Dow Corning Corporation. 2) "Omniplus White"; Sonneborn Building Products Division/ChemRex, Inc. 3) "Proglaze"; Tremco, Inc. 3. All-Purpose Urethane Sealant: Multipart, nonsag, Type M, Grade NS, Class 25, Uses M. a. Products: b. "Sonolastic NP 2"; Sonneborn Building Products Division/ChemRex, Inc.

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c. "Dymeric"; Tremco, Inc. d. "Vulkem 922"; Mameco International, Inc. C. PAVING JOINT SEALANTS 1. Two-Part Urethane Paving Sealant: Pourable, chemically curing (cold-applied) complying with FS SS-S-200: a. Composition: Urethane, with minimum movement capability of plus or minus 12-1/2 percent. b. Products: 1) "THC-900/901"; Tremco, Inc. 2) "Sonolastic NP 2"; Sonneborn Building Products Division/ChemRex, Inc. 3) "Vulkem 245"; Mameco International, Inc. D. LATEX SEALANTS 1. Acrylic-Latex Emulsion Sealant: One-part, nonsag, mildew-resistant, paintable; complying with ASTM C 834. a. Products: 1) "AC-20"; Pecora Corporation. 2) "Sonolac"; Sonneborn Building Products Division/ChemRex, Inc. E. EPOXY JOINT FILLER - FLOORS 1. Composition: 100% solids, two-component, moisture insensitive, semi-rigid product. 2. Products: a. "Poxy-Fil (J-52)"; Dayton Superior Corporation. b. "Epolith-P"; Sonneborn Building Products Division/ChemRex, Inc. c. "Sikadur51-SL"; Sika Corporation. d. "MM-80"; Metzer McGuire Corporation. F. FIRESTOP SEALANTS 1. General: A high temperature smoke and fire-resistant product, designed for use as a fire and smoke stop for sealing around penetrations through fire-rated wall and floor assemblies. a. Rating Requirements: ASTM E-814 (UL 1479); ASTM E-84. 2. Composition: A single component, neutral cure, silicone rubber sealant. 3. Products: a. STI Products b. "Fire-Shield"; Tremco. c. "Fire-Stop Sealant"; Dow Corning, Inc. d. "Pensil 100 Sealant"; General Electric Silicones. s. "CS 240 Fire Stop Sealant"; Hilti, Inc. f. "QP-25"; 3M Companies. G. USDA APPROVED SEALANT - FOOD PREP AREAS 1. General: Premium grade, high-performance, moisture curing, single component urethane (or mildew-resistant silicone - depending on usage area), elastomeric sealant conforming to U.S.D.A. specifications. 2. Products: a. "Sikaflex-1a"; Sika Corporation. b. "Proglaze"; Tremco, Inc. Verify product (color) conformance with U.S.D.A. specifications. c. "Dymeric"; Tremco, Inc. Verify product (color) conformance with U.S.D.A. specifications. H. Acoustical Sealant: Butyl or acrylic sealant; ASTM C 920, Grade NS, Class 12-1/2, Uses M and A; single component, solvent release curing, non-skinning.

2.02 ACCESSORIES A. Primer: Non-staining type, recommended by sealant manufacturer to suit application. B. Joint Cleaner: Non-corrosive and non-staining type, recommended by sealant manufacturer; compatible with joint forming materials. C. Joint Backing: Round foam rod compatible with sealant; ASTM D 1667, closed cell PVC; oversized 30 to 50 percent larger than joint width.

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1. Nonstaining; recommended or approved by sealant manufacturer for specific use. 2. Required for the following conditions: a. Use as a "filler/backer" material. b. Use where joint movement can be expected. D. Epoxy Joint Filler: Clean silica sand. E. Bond Breaker: Pressure sensitive tape recommended by sealant manufacturer to suit application.

PART 3 EXECUTION

3.01 EXAMINATION A. Verify that substrate surfaces are ready to receive work. B. Verify that joint backing and release tapes are compatible with sealant. C. Examine joints for characteristics that may affect sealer performance, including configuration and dimensions. D. Do not begin joint sealer work until unsatisfactory conditions have been corrected.

3.02 PREPARATION A. Remove loose materials and foreign matter which might impair adhesion of sealant. B. Clean and prime joints in accordance with manufacturer's instructions. C. Perform preparation in accordance with manufacturer's instructions and ASTM C 1193. D. Protect elements surrounding the work of this section from damage or disfigurement. E. Dry out damp and wet substrates thoroughly. F. Clean M-type substrates by suitable mechanical or chemical methods. G. Concrete: Remove laitance and form-release coatings. H. Use methods which will not leave residues that will impair adhesion. I. Priming: Prime substrates as recommended by sealer manufacturer. J. Masking Tape: Use masking tape to keep primers and sealers off of adjacent surfaces which would be damaged by contact or by cleanup. Remove tape as soon as practical. K. Install fillers where needed to provide proper joint depth or support for sealant backers.

3.03 INSTALLATION A. Perform work in accordance with sealant manufacturer's requirements for preparation of surfaces and material installation instructions. B. Perform installation in accordance with ASTM C 1193. C. Perform acoustical sealant application work in accordance with ASTM C 919. D. Measure joint dimensions and size joint backers to achieve width-to-depth ratio, neck dimension, and surface bond area as recommended by manufacturer, except where specific dimensions are indicated. E. Install bond breaker where joint backing is not used. F. Install sealant free of air pockets, foreign embedded matter, ridges, and sags. G. Apply sealant within recommended application temperature ranges. Consult manufacturer when sealant cannot be applied within these temperature ranges. H. Tool joints concave. I. Precompressed Foam Sealant: Do not stretch; avoid joints except at corners, ends, and intersections; install with face 1/8 to 1/4 inch below adjoining surface. J. Compression Gaskets: Avoid joints except at ends, corners, and intersections; seal all joints with adhesive; install with face 1/8 to 1/4 inch below adjoining surface.

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3.04 CLEANING A. Clean adjacent soiled surfaces adjacent to joints as work progresses and before sealants set using methods and materials approved by manufacturers of sealers and of surfaces to be cleaned.

3.05 PROTECTION OF FINISHED WORK A. Protect sealants until cured. and from contamination and damage. B. Remove and replace damaged sealers.

3.06 SCHEDULE A. All Exterior Joints - Building Walls: Under separate contract. B. Exterior Concrete Walks/Drive Slabs: Under separate contract. C. Interior Caulk - Latex Product: 1. Use the following sealants: a. Latex sealant. - Colored. 2. Backer: None required, except use backer rod for the following conditions: a. Where joint filler is required. b. Where movement can be expected. 3. Joint shape: Concave joint configuration. D. Interior Sealant - Wet Areas: 1. Use one of the following sealants: a. Mildew-resistant silicone sealant. - Colored. 2. Backer: None required, except use backer rod for the following conditions: a. Where joint filler is required. b. Where movement can be expected. 3. Joint shape: Concave joint configuration. E. Epoxy - Floor Joint: 1. Use the following floor sealant: a. Epoxy joint filler.- Color: Selection by architect. b. Backer: Silica sand. c. Joint shape: Flush joint configuration. F. Fire-Stop Rated Product: 1. Use the following sealant: a. Fire-stop sealant. - Colored (verify with product). Products as approved by GVSU. Standards are based on products from STI, HILTI, 3M, or equal. b. Backer: None. c. Joint shape: Concave joint configuration. d. Must be used in accordance with certified UL assemblies and systems. G. Food Preparation Area/Kitchenette/Copy room. 1. Use the following sealant: a. U.S.D.A. approved sealant. - Colored (verify with product). 2. Backer: None. 3. Joint shape: Concave joint configuration.

END OF SECTION 07 92 00

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