Section 095423 - Linear Metal Ceilings

This Product MasterSpec Section is licensed by ARCOM to USG Corporation ("Licensee").

This Product MasterSpec Section modifies the original MasterSpec text.

Revisions made to the original MasterSpec text are made solely by the Licensee and are not endorsed by, or representative of the opinions of, ARCOM or The American Institute of Architects (AIA). Neither AIA nor ARCOM are liable in any way for such revisions or for the use of this Product MasterSpec Section by any end user. A qualified design professional should review and edit the document to suit project requirements.

For more information, contact USG Corporation, 550 West Adams Street, Chicago, IL 60661; Phone: (800) 874-4968; Website: www.usg.com; Email: [email protected].

For information about MasterSpec contact ARCOM at (800) 424-5080 or visit www.MasterSpec.com.

SECTION 095423 - LINEAR METAL CEILINGS

To view non-printing Editor's Notes that provide guidance for editing, click on MasterWorks/Single- File Formatting/Toggle/Editor's Notes.

To read detailed research, technical information about products and materials, and coordination checklists, click on MasterWorks/Supporting Information.

PART 1 - GENERAL

0.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 01 Specification Sections, apply to this Section.

0.2 SUMMARY

A. Section includes strip, linear metal pans and suspension systems for ceilings.

B. Related Requirements:

1. Section 095133 "Acoustical Metal Pan Ceilings" for clip-in, lay-in, snap-in, and torsion- spring-hinged metal pan ceilings with exposed suspension systems.

0.3 DEFINITIONS

A. LR: Light Reflectance coefficient.

B. NRC: Noise Reduction Coefficient.

0.4 COORDINATION

A. Coordinate layout and installation of linear metal pans and suspension system with other construction that penetrates ceilings or is supported by them, including light fixtures, HVAC equipment, fire-suppression system, and partition assemblies.

0.5 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at [Project site] .

0.6 ACTION SUBMITTALS

A. Product Data: For each type of product.

B. Sustainable Design Submittals:

1. Product Data: For recycled content, indicating postconsumer and preconsumer recycled content and cost.

C. Samples for Initial Selection: For components with factory-applied color and other decorative finishes.

D. Samples for Verification: For each component indicated and for each exposed finish required, prepared on Samples of size indicated below:

1. Linear Metal Pan: Set of 12-inch- (300-mm-) long Samples of each type and color and a 12-inch- (300-mm-) long spliced section. 2. Suspension System Members: 12-inch- (300-mm-) long Sample of each type. 3. Exposed Molding and Trim: Set of 12-inch- (300-mm-) long Samples of each type, finish, and color. 4. Filler Strips: Set of 12-inch- (300-mm-) long Samples of each type, finish, and color. 5. Sound Absorber: 12 inches (300 mm) long. 6. End Cap: Full size.

E. Delegated-Design Submittal: For design of [seismic restraints and ]attachment devices.

0.7 INFORMATIONAL SUBMITTALS

A. Coordination Drawings: Reflected ceiling plans, drawn to scale, on which the following items are shown and coordinated with each other, using input from installers of the items involved:

1. Linear pattern. 2. Joint pattern. 3. Ceiling suspension members. 4. Method of attaching hangers to building structure.

a. Furnish layouts for cast-in-place anchors, clips, and other ceiling attachment devices whose installation is specified in other Sections.

5. Ceiling-mounted items including light fixtures, diffusers, grilles, speakers, sprinklers, and access panels. 6. Ceiling perimeter and penetrations through ceiling; trim and moldings. 7. Minimum Drawing Scale: [1/4 inch = 1 foot (1:48)] [1/8 inch = 1 foot (1:96)] [1:50] [1:100] .

B. Qualification Data: For testing agency.

C. Product Test Reports: For each linear metal ceiling, for tests performed by a qualified testing agency.

D. Evaluation Reports: For linear metal ceiling and components[ and anchor and fastener type].

E. Field quality-control reports.

0.8 CLOSEOUT SUBMITTALS

A. Maintenance Data: For finishes to include in maintenance manuals.

0.9 MAINTENANCE MATERIAL SUBMITTALS

A. Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1. Linear Metal Ceiling Components: Quantity of each pan, carrier, accessory, and exposed molding and trim equal to [2] percent of quantity installed.

0.10 QUALITY ASSURANCE

A. Testing Agency Qualifications: Accredited by National Voluntary Laboratory Accreditation Program for testing indicated.

B. Mockups: Build mockups to verify selections made under Sample submittals and to demonstrate aesthetic effects and to set quality standards for materials and execution.

1. Subject to compliance with requirements, approved mockups may become part of the completed Work if undisturbed at time of Substantial Completion.

0.11 DELIVERY, STORAGE, AND HANDLING

A. Deliver linear metal pans, suspension system components, and accessories to Project site in original, unopened packages and store them in a fully enclosed, conditioned space where they are protected against damage from moisture, humidity, temperature extremes, direct sunlight, surface contamination, and other causes.

B. Handle linear metal pans, suspension system components, and accessories carefully to avoid damaging units and finishes in any way.

0.12 PROJECT CONDITIONS

A. Environmental Limitations: Do not install linear metal ceilings until spaces are enclosed and weathertight, wet work in spaces is complete and dry, work above ceilings is complete, and ambient temperature and humidity conditions are maintained at the levels indicated for Project when occupied for its intended use.

PART 2 - PRODUCTS

0.1 PERFORMANCE REQUIREMENTS

A. Delegated Design: Engage a qualified professional engineer, as defined in Section 014000 "Quality Requirements" to design [seismic restraints and ]attachment devices.

B. Structural Performance: Exterior linear metal ceilings shall withstand exterior exposure and the effects of gravity loads and the following loads and stresses without showing permanent deformation of ceiling system components including pans and suspension system; noise or metal fatigue caused by vibration, deflection, and displacement of ceiling pans; or permanent damage to fasteners and anchors:

1. Wind Load: Uniform pressure [of 20 lbf/sq. ft. (960 Pa)] [of 30 lbf/sq. ft. (1436 Pa)] [as indicated on Drawings] , acting inward or outward. 2. Seismic Criteria: Provide linear metal ceilings designed and installed to withstand the effects of earthquake motions according to the following:

a. Standard for Ceiling Suspension Systems Requiring Seismic Restraint: Comply with ASTM E 580/E 580M. b. CISCA's Recommendations for Acoustical Ceilings: Comply with CISCA's "Recommendations for Direct-Hung Acoustical Tile and Lay-in Panel Ceilings - Seismic Zones 0-2." c. CISCA's Guidelines for Systems Requiring Seismic Restraint: Comply with CISCA's "Guidelines for Seismic Restraint of Direct-Hung Suspended Ceiling Assemblies - Seismic Zones 3 & 4." d. ASCE/SEI 7, "Minimum Design Loads for Buildings and Other Structures": Section 9, "Earthquake Loads."

C. Thermal Movements: Allow for thermal movements from ambient and surface temperature changes.

1. Temperature Change (Range): [120 deg F (67 deg C), ambient; 180 deg F (100 deg C) material surfaces] .

D. Recycled Content of Steel Products: Postconsumer recycled content plus one-half of preconsumer recycled content not less than [25] percent.

E. Surface-Burning Characteristics: Comply with ASTM E 84; testing by a qualified testing agency. Identify products with appropriate markings of applicable testing agency.

1. Flame-Spread Index: Comply with ASTM E 1264 for [Class A] [Class B] [Class C] materials. 2. Smoke-Developed Index: [50] [450] or less.

0.2 LINEAR METAL CEILING PANS

A. Acoustical Metal Pan Standard: Provide manufacturer's standard linear metal pans of configuration indicated that comply with ASTM E 1264 classifications as designated by types, acoustical ratings, and light reflectances unless otherwise indicated.

1. Mounting Method for Measuring NRC: Type E-400; plenum mounting in which face of test specimen is 15-3/4 inches (400 mm) away from test surface per ASTM E 795.

B. Sheet Metal Characteristics: For metal components exposed to view in the completed Work, provide materials with smooth, flat surfaces without blemishes. Do not use materials with exposed pitting, seam marks, roller marks, roughness, stains, or discolorations.

1. Aluminum Sheet: Roll-formed aluminum sheet, complying with ASTM B 209 (ASTM B 209M); alloy and temper recommended by aluminum producer and finisher for type of use and finish indicated. 2. Steel Sheet: Commercial-quality, cold-rolled, carbon-steel sheet; stretcher leveled; with protective coating complying with ASTM C 635/C 635M.

a. Painted Finishes: Electrolytic zinc-coated steel complying with ASTM A 879/A 879M, 04Z (12G) coating; surface treatment as recommended by finish manufacturer for type of use and finish indicated. b. Chemical/Mechanical Finishes: Uncoated steel sheet complying with ASTM A 1008/A 1008M with luster or bright finish as required by finisher for applying electroplating or other metallic-finishing processes.

3. Stainless-Steel Sheet: Complying with ASTM A 240/A 240M, [Type 304] [Type 430].

C. Pan Fabrication: Manufacturer's standard units of size, profile, and edge treatment indicated, formed from metal indicated to snap on and be securely retained on carriers without separate fasteners, and finished to comply with requirements indicated.

D. Pan Splices: Construction same as pans, in lengths 8 to 12 inches (200 to 300 mm); with manufacturer's standard finish.

E. End Caps: [Metal matching pans] [Plastic] [Manufacturer's standard material]; fabricated to fit and conceal exposed ends of pans.

F. Filler Strips: [Metal matching pans] [Plastic] [Manufacturer's standard material]; fabricated to uninterruptedly close voids between pans.

G. Moldings and Trim: Provide manufacturer's standard moldings and trim for exposed members, and as indicated or required, for edges and penetrations of ceiling, around fixtures, at changes in ceiling height, and for other conditions; of same metal and finish as linear metal ceiling pans.

H. Sound-Absorbent Fabric Layer: Provide fabric layer, sized to fit concealed surface of pan, and consisting of black, nonwoven, nonflammable, sound-absorbent material with surface-burning characteristics for flame-spread index of 25 or less and smoke-developed index of 50 or less, as determined by testing per ASTM E 84.

1. Bond fabric layer to pan in the factory with manufacturer's standard nonflammable adhesive.

I. Sound-Absorbent Pads: Provide width and length to completely fill between carriers, joined at center of panel, with surface-burning characteristics for flame-spread index of 25 or less and smoke-developed index of 50 or less, as determined by testing per ASTM E 84, and to comply with the following requirements:

1. Plastic Sheet-Wrapped Mineral-Fiber Insulation: Pads consisting of nonrigid, PVC plastic sheet encapsulating unfaced mineral-fiber insulation complying with ASTM C 553, Type I, II, or III, and as follows:

a. Mineral-Fiber Type and Thickness: Glass fiber; [1 inch (25 mm)] [1-1/2 inches (38 mm)] [3 inches (76 mm)] . b. Mineral-Fiber Density: [3/4 lb/cu. ft. (12 kg/cu. m)] [1 lb/cu. ft. (16 kg/cu. m)] [1-1/2 lb/cu. ft. (24 kg/cu. m)] . c. Plastic Sheet Thickness and Color: Not less than 0.003 inch (0.076 mm); [clear] [flat black] [white] .

2. Unwrapped, Glass-Fiber Insulation: Black-coated, unfaced, glass-fiber insulation complying with ASTM C 553, Type I, II, or III, not less than 1-lb/cu. ft. (16-kg/cu. m) density, treated to be nondusting, and as follows:

a. Thickness: [1 inch (25 mm)] [1-1/2 inches (38 mm)] .

0.3 METAL SUSPENSION SYSTEMS

A. Metal Suspension Systems Standard: Provide ceiling manufacturer's standard metal suspension systems of types and finishes indicated that comply with applicable ASTM C 635/C 635M requirements.

B. Suspension Systems: Provide systems complete with carriers, splice sections, connector clips, alignment clips, leveling clips, hangers, molding, trim, retention clips, load-resisting struts, fixture adapters, and other suspension components required to support ceiling units and other ceiling-supported construction.

C. Attachment Devices: Size for five times the design load indicated in ASTM C 635/C 635M, Table 1, Direct Hung, unless otherwise indicated.

1. Cast-in-Place and Postinstalled Anchors in Concrete: Anchors of type and material indicated below, with holes or loops for attaching hangers of type indicated and with capability to sustain, without failure, a load equal to [five] times that imposed by ceiling construction, as determined by testing per ASTM E 488/E 488M or ASTM E 1512 as applicable, conducted by a qualified testing and inspecting agency.

a. Type: [Cast-in-place] [Postinstalled expansion] [Postinstalled bonded] anchors. b. Corrosion Protection: Carbon-steel components zinc plated to comply with ASTM B 633, Class Fe/Zn 5 (0.005 mm) for Class SC service condition (mild). c. Corrosion Protection: Stainless-steel components complying with ASTM F 593 and ASTM F 594, Group 1 Alloy 304 or 316 for bolts; Alloy 304 or 316 for anchors. d. Corrosion Protection: Components fabricated from nickel-copper-alloy rods complying with ASTM B 164 for UNS No. N04400 alloy.

2. Power-Actuated Fasteners in Concrete: Fastener system of type suitable for application indicated, fabricated from corrosion-resistant materials, with clips or other accessory devices for attaching hangers of type indicated, and with capability to sustain, without failure, a load equal to [10] times that imposed by ceiling construction, as determined by testing per ASTM E 1190, conducted by a qualified testing and inspecting agency.

D. Wire Hangers, Braces, and Ties: Provide wire complying with the following requirements:

1. Zinc-Coated, Carbon-Steel Wire: ASTM A 641/A 641M, Class 1 zinc coating, soft temper. 2. Stainless-Steel Wire: ASTM A 580/A 580M, Type 304, nonmagnetic. 3. Nickel-Copper-Alloy Wire: ASTM B 164, nickel-copper-alloy UNS No. N04400. 4. Size: Select wire diameter so its stress at 3 times the hanger design load indicated in ASTM C 635/C 635M, Table 1, Direct Hung is less than yield stress of wire, but provide not less than [0.106-inch- (2.69-mm-)] [0.135-inch- (3.5-mm-)] diameter wire.

E. [Hanger Rods] [Flat Hangers]: Mild steel, zinc coated or protected with rust-inhibitive paint.

F. Angle Hangers: Angles with legs not less than 7/8 inch (22 mm) wide; formed from 0.04-inch- (1.0-mm-) thick, galvanized-steel sheet complying with ASTM A 653/A 653M, G90 (Z275) coating designation; with bolted connections and 5/16-inch- (8-mm-) diameter bolts.

G. Carriers: Factory finished [with matte-black baked finish] .

1. Main Carriers: Aluminum, not less than 0.240-inch (6.0-mm) rolled sheet, alloy and temper recommended by aluminum producer and finisher for type of use and finish indicated, complying with ASTM B 209 (ASTM B 209M). 2. Main Carriers: Steel, not less than 0.0209-inch (0.53-mm) nominal thickness, cold-rolled sheet, with factory-applied protective coating, complying with ASTM C 635/C 635M.

a. Electrolytic Zinc-Coated Steel: ASTM A 879/A 879M, not less than [08Z (24G)] zinc coating. b. Hot-Dip Galvanized Steel: ASTM A 653/A 653M, not less than [G60 (Z180)] zinc coating.

3. Adaptable Carriers: Manufacturer's standard carriers for direct attachment to existing suspended tees. 4. Flexible Radial Carriers: Manufacturer's standard radial carriers. 5. Expansion Carriers: Manufacturer's standard carriers allowing for irregularities or other unusual space conditions.

H. Carrier Splices: Same metal, profile, and finish as for carriers.

I. Stabilizer Channels, Tees, and Bars: Manufacturer's standard components for stabilizing main carriers at regular intervals and at light fixtures, air-distribution equipment, access doors, and other equipment; spaced as standard with manufacturer for use indicated; and factory finished with matte-black baked finish.

J. Seismic Struts: Manufacturer's standard compression struts designed to accommodate seismic forces.

K. Exterior Bracing: Cold-rolled steel channels and angles, hot-dip galvanized to comply with ASTM A 653/A 653M, G60 (Z180) coating designation; size and profile as required to withstand wind load.

L. Hold-Down Clips: Manufacturer's standard hold-down clips spaced as standard with manufacturer.

M. Edge Moldings and Trim: Provide exposed members as indicated or required to comply with seismic requirements of authorities having jurisdiction, to conceal edges of penetrations through ceiling, to conceal ends of pans and carriers, for fixture trim and adapters, for fasciae at changes in ceiling height, and for other conditions; of metal and finish matching linear metal pans or extruded plastic unless otherwise indicated.

1. For Circular Penetrations of Ceiling: Fabricate edge moldings to diameter required to fit penetration exactly.

0.4 ALUMINUM PANS AND SUSPENSION SYSTEM FOR LINEAR METAL CEILING

A. Aluminum Pans and Suspension System:

1. Basis-of-Design Product: Subject to compliance with requirements, provide USG Corporation; USG Paraline Linear Metal Ceiling System or a comparable product by one of the following:

a. Ceilings Plus. b. Chicago Metallic Corporation. c. Hunter Douglas Architectural Products, Inc. d. Simplex Ceilings, a division of Intalite Inc. e. .

B. Classification: Units complying with ASTM E 1264 for [Type XIII, aluminum strips with mineral- or glass-fiber-base backing; Form 1, perforated] [Type XIII, aluminum strips with mineral- or glass-fiber-base backing; Form 2, unperforated] [Type XX, other types described as perforated aluminum strips with sound-absorbent fabric backing] .

1. Pattern: .

C. Pan Thickness: Not less than [0.018 inch (0.46 mm)] [0.022 inch (0.56 mm)] [0.024 inch (0.6 mm)] [0.025 inch (0.65 mm)] [0.027 inch (0.7 mm)] [0.032 inch (0.8 mm)] [0.040 inch (1.0 mm)] .

D. Pan Edge Detail: [Beveled] [Square] [Round] [Manufacturer's standard edge detail].

E. Linear Module Width and Pan Face Width: [2-inch (51-mm) module width and 1-1/4-inch (32-mm) face width] [4-inch (102-mm) module width and 3-1/4-inch (83-mm) face width] [6-inch (152-mm) module width and 5-1/4-inch (133-mm) face width] [8-inch (203-mm) module width and 7-1/4-inch (184-mm) face width] [100-mm module width and 80-mm face width] [200-mm module width and 180-mm face width] [300-mm module width and 280-mm face width] [As indicated on Drawings] .

F. Pan Depth: [5/8 inch (16 mm) deep] [3/4 inch (19 mm) deep] [Not less than 1 to 1-1/2 inches (25 to 38 mm) deep] [15 mm deep] [As indicated] .

G. Pan Face Finish: [Mill] [Lacquered mill] [Clear anodized] [Clear mirror-anodized] [Painted white] [Painted to match color indicated by product designation] [Painted to match Architect's sample] [Painted in color selected from manufacturer's full range] [High-performance organic coating in color selected from manufacturer's full range] [Bright-reflective finish selected from manufacturer's full range] .

H. End Cap, Finish of Exposed Portions: [Matte black] [To match pan] [Manufacturer's standard finish].

I. Filler Strip Design: [Recessed] [Flush] [An integral extension of pan profile] [Expansion, for use with expansion carriers] [Slotted, for air diffusion].

J. Filler Strip, Finish of Exposed Portions: [Matte black] [To match pan].

K. LR: Not less than [0.70] [0.75] .

L. NRC: Not less than [0.65] [0.75] [0.95] .

M. Suspension-System Main-Carrier Material: [Aluminum] [Electrolytic zinc-coated steel] [Hot- dip galvanized steel] [Manufacturer's standard material and protective finish].

0.5 STEEL PANS AND SUSPENSION SYSTEM FOR LINEAR METAL CEILING

A. Steel Pans and Suspension System:

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

a. Ceilings Plus. b. Chicago Metallic Corporation. c. Hunter Douglas Architectural Products, Inc. d. .

B. Classification: Units complying with ASTM E 1264 for [Type XIII, steel strips with mineral- or glass-fiber-base backing; Form 1, perforated] [Type XIII, steel strips with mineral- or glass-fiber-base backing; Form 2, unperforated] [Type XX, other types described as perforated steel strips with sound-absorbent fabric backing] .

1. Pattern: .

C. Pan Thickness: Not less than [0.015 inch (0.4 mm)] [0.020 inch (0.5 mm)] [0.024 inch (0.6 mm)] [0.030 inch (0.75 mm)] .

D. Pan Edge Detail: [Beveled] [Square] [Round] [Manufacturer's standard edge detail].

E. Linear Module Width and Pan Face Width: [2-inch (51-mm) module width and 1-1/4-inch (32-mm) face width] [4-inch (102-mm) module width and 3-1/4-inch (83-mm) face width] [6-inch (152-mm) module width and 5-1/4-inch (133-mm) face width] [8-inch (203-mm) module width and 7-1/4-inch (184-mm) face width] [As indicated on Drawings] .

F. Pan Depth: [5/8 inch (16 mm) deep] [3/4 inch (19 mm) deep] [Not less than 1 to 1-1/2 inches (25 to 38 mm) deep] [15 mm deep] [As indicated] .

G. Pan Face Finish: [Painted white] [Painted to match color indicated by product designation] [Painted to match Architect's sample] [Painted in color selected from manufacturer's full range] [Electroplated finish selected from manufacturer's full range] .

K. LR: Not less than [0.70] [0.75] .

L. NRC: Not less than [0.65] [0.75] [0.95] .

M. Suspension-System Main-Carrier Material: [Aluminum] [Electrolytic zinc-coated steel] [Hot- dip galvanized steel] [Manufacturer's standard material and protective finish].

0.6 STAINLESS-STEEL PANS AND SUSPENSION SYSTEM FOR LINEAR METAL CEILING

A. Stainless-Steel Pans and Suspension System:

1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

a. American Decorative Ceilings (ADC). b. Ceilings Plus. c. .

B. Classification: Units complying with ASTM E 1264 for [Type XIII, stainless-steel strips with mineral- or glass-fiber-base backing; Form 1, perforated] [Type XIII, stainless-steel strips with mineral- or glass-fiber-base backing; Form 2, unperforated] [Type XX, other types described as perforated stainless-steel strips with sound-absorbent fabric backing] .

1. Pattern: .

C. Pan Thickness: Not less than [0.016 inch (0.396 mm)] [0.019 inch (0.475 mm)] .

D. Pan Edge Detail: [Manufacturer's standard edge detail] .

E. Linear Module Width and Pan Face Width: [2-inch (51-mm) module width and 1-1/4-inch (32-mm) face width] [4-inch (102-mm) module width and 3-1/4-inch (83-mm) face width] [6-inch (152-mm) module width and 5-1/4-inch (133-mm) face width] [8-inch (203-mm) module width and 7-1/4-inch (184-mm) face width] [As indicated on Drawings] .

F. Pan Depth: [5/8 inch (16 mm) deep] [As indicated] .

G. Pan Face Finish: [Brushed, directional polish] [Satin, directional polish] [Mirrorlike reflective, nondirectional polish] .

K. NRC: Not less than [0.65] [0.75] [0.95] .

L. Suspension-System Main-Carrier Material: [Aluminum] [Electrolytic zinc-coated steel] [Hot- dip galvanized steel] [Manufacturer's standard material and protective finish].

0.7 ACCESSORIES

A. Access Panels: For access at locations indicated, provide door hinge assembly, retainer clip, and retainer bar, assembled with ceiling panels and carrier sections into access doors of required size, permitting upward or downward opening.

0.8 GENERAL FINISH REQUIREMENTS

A. Protect mechanical finishes on exposed surfaces from damage by applying a strippable, temporary protective covering before shipping.

B. Appearance of Finished Work: Noticeable variations in same piece are not acceptable. Variations in appearance of adjoining components are acceptable if they are within the range of approved Samples and are assembled or installed to minimize contrast.

C. High-Humidity Finish: Comply with ASTM C 635/C 635M requirements for "Coating Classification for Severe Environment Performance" where high-humidity finishes are indicated.

0.9 ALUMINUM FINISHES

A. Mill Finish: AA-M10C10.

B. Lacquered Mill Finish: AA-M10C10R1x with manufacturer's standard clear, organic coating.

C. Clear Anodic Finish: AAMA 611, AA-M12C22A31, Class II, 0.010 mm or thicker.

D. Clear Mirror Anodic Finish: AA-M21C12A212, 0.005 mm or thicker.

E. Color-Coated Finish: Manufacturer's standard[ powder-coat] baked paint finish complying with coating manufacturer's written instructions for surface preparation, pretreatment, application, baking, and minimum dry film thickness.

F. High-Performance Organic Finish: Two-coat fluoropolymer finish complying with [AAMA 2604] [AAMA 2605] and containing not less than [50] [70] percent PVDF resin by weight in color coat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.

G. Bright-Reflective Finish: Manufacturer's standard chemical/mechanical, bright-reflective metallic finish complying with finish manufacturer's written instructions for surface preparation, pretreatment, process, protective coating, and minimum thickness to produce a finish uniform in appearance and free of blisters, pits, roughness, nodules, burning, cracks, unfinished areas, and other visible defects.

0.10 GALVANIZED-STEEL SHEET FINISHES

A. Color-Coated Finish: Manufacturer's standard[ powder-coat] baked paint finish complying with coating manufacturer's written instructions for surface preparation, pretreatment, application, baking, and minimum dry film thickness.

0.11 STEEL SHEET FINISHES

A. Electroplated Finish: Electroplating process complying with finish manufacturer's written instructions for surface preparation, pretreatment, process, and minimum thickness to produce a

coating uniform in appearance and free of blisters, pits, roughness, nodules, burning, cracks, unplated areas, and other visible defects.

B. Bright-Reflective Finish: Manufacturer's standard chemical/mechanical, bright-reflective metallic finish complying with finish manufacturer's written instructions for surface preparation, pretreatment, process, protective coating, and minimum thickness to produce a finish uniform in appearance and free of blisters, pits, roughness, nodules, burning, cracks, unfinished areas, and other visible defects.

0.12 STAINLESS-STEEL FINISHES

A. Surface Preparation: Remove tool and die marks and stretch lines, or blend into finish.

B. Polished Finishes: Grind and polish surfaces to produce uniform finish, free of cross scratches.

1. Run grain of directional finishes with long dimension of each piece. 2. When polishing is completed, passivate and rinse surfaces. Remove embedded foreign matter and leave surfaces chemically clean.

PART 3 - EXECUTION

0.1 EXAMINATION

A. Examine substrates, areas, and conditions, including structural framing and substrates to which linear metal ceilings attach or abut, with Installer present, for compliance with requirements specified in this and other Sections that affect ceiling installation and anchorage and with requirements for installation tolerances and other conditions affecting performance of linear metal ceilings.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

0.2 PREPARATION

A. Measure each ceiling area and establish layout of linear metal pans to balance border widths at opposite edges of each ceiling. Avoid using less-than-half-width pans at borders, and comply with layout shown on reflected ceiling plans and on Coordination Drawings.

0.3 INSTALLATION

A. Comply with ASTM C 636/C 636M and seismic requirement indicated, per manufacturer's written instructions and CISCA's "Ceiling Systems Handbook."

B. Suspend ceiling hangers from building's structural members and as follows:

1. Install hangers plumb and free from contact with insulation or other objects within ceiling plenum that are not part of supporting structure or of ceiling suspension system.

2. Splay hangers only where required to miss obstructions; offset resulting horizontal forces by bracing, countersplaying, or other equally effective means. 3. Where width of ducts and other construction within ceiling plenum produces hanger spacings that interfere with location of hangers at spacings required to support standard suspension system members, install supplemental suspension members and hangers in form of trapezes or equivalent devices. 4. Secure wire hangers to ceiling suspension members and to supports above with a minimum of three tight turns. Connect hangers directly either to structures or to inserts, eye screws, or other devices that are secure and appropriate for substrate to which hangers are attached and for type of hanger involved. 5. Secure flat, angle, channel, and rod hangers to structure, including intermediate framing members, by attaching to inserts, eye screws, or other devices that are secure and appropriate for both structure to which hangers are attached and type of hanger involved. Install hangers in a manner that does not cause them to deteriorate or fail due to age, corrosion, or elevated temperatures. 6. Do not support ceilings directly from permanent metal forms or floor deck. Fasten hangers to cast-in-place hanger inserts, postinstalled mechanical or adhesive anchors, or power-actuated fasteners that extend through forms into concrete. 7. When steel framing does not permit installation of hanger wires at spacing required, install carrying channels or other supplemental support for attachment of hanger wires. 8. Do not attach hangers to steel deck tabs. 9. Do not attach hangers to steel roof deck. Attach hangers to structural members. 10. Space hangers not more than 48 inches (1200 mm) o.c. along each member supported directly from hangers unless otherwise indicated; provide hangers not more than 8 inches (200 mm) from ends of each member. 11. Size supplemental suspension members and hangers to support ceiling loads within performance limits established by referenced standards and publications.

C. Secure bracing wires to ceiling suspension members and to supports with a minimum of four tight turns. Suspend bracing from building's structural members as required for hangers but without attaching to permanent metal forms, steel deck, or steel deck tabs. Fasten bracing wires into concrete with cast-in-place or postinstalled anchors.

D. Install edge moldings and trim of type indicated at perimeter of linear metal ceiling area and where necessary to conceal edges and ends of linear metal pans.

1. Screw attach moldings to substrate at intervals not more than 16 inches (400 mm) o.c. and not more than 3 inches (75 mm) from ends, leveling with ceiling suspension system to a tolerance of 1/8 inch in 12 feet (3.2 mm in 3.6 m). Miter corners accurately and connect securely. 2. Do not use exposed fasteners, including pop rivets, on moldings and trim.

E. Install suspension system carriers so they are aligned and securely interlocked with one another. Remove and replace dented, bent, or kinked members.

F. Cut linear metal pans for accurate fit at borders and at interruptions and penetrations by other work through ceilings. Stiffen edges of cut units as required to eliminate evidence of buckling or variations in flatness exceeding referenced standards for stretcher-leveled metal sheet.

G. Install linear metal pans in coordination with suspension system and exposed moldings and trim.

1. Align joints in adjacent courses to form uniform, straight joints parallel to room axis in both directions unless otherwise indicated. 2. Fit adjoining units to form flush, tight joints. Scribe and cut units for accurate fit at borders and around construction penetrating ceiling. 3. Install pans with butt joints using internal pan splices and in the following joint configuration:

a. Aligned. b. Aligned, every other pan length. c. Staggered a minimum of 12 inches (300 mm). d. Random. e. As indicated.

4. Install directionally textured metal pans in directions indicated. 5. Where metal pan ends are visible, install end caps unless trim is indicated. 6. Install filler strips where indicated. 7. Install sound-absorbent pads at right angle to perforated metal pans so pads do not hang unsupported.

H. Install hold-down clips where indicated.

0.4 FIELD QUALITY CONTROL

A. Special Inspections: [Owner will engage] [Engage] a qualified special inspector to perform the following special inspections:

1. Suspended ceiling system. 2. Hangers, anchors, and fasteners. 3. .

B. Testing Agency: [Owner will engage] [Engage] a qualified testing agency to perform tests and inspections.

C. Tests and Inspections: Testing and inspecting of completed installations of linear metal ceiling hangers and anchors and fasteners shall take place in successive stages, in areas of extent and using methods as follows. Do not proceed with installations of linear metal ceiling hangers for the next area until test results for previously completed installations show compliance with requirements.

1. Extent of Each Test Area: When installation of ceiling suspension systems on each floor has reached 20 percent completion but no panels have been installed.

a. Within each test area, testing agency will select 1 of every 10 power-actuated fasteners and postinstalled anchors used to attach hangers to concrete and will test them for 200 lbf (890 N) of tension; it will also select 1 of every 2 postinstalled anchors used to attach bracing wires to concrete and will test them for 440 lbf (1957 N) of tension. b. When testing discovers fasteners and anchors that do not comply with requirements, testing agency will test those anchors not previously tested until 20 pass consecutively and then will resume initial testing frequency.

D. Linear metal ceiling hangers and anchors and fasteners will be considered defective if they do not pass tests and inspections.

E. Prepare test and inspection reports.

0.5 CLEANING

A. Clean exposed surfaces of linear metal ceilings, including trim and edge moldings after removing strippable, temporary protective covering if any. Comply with manufacturer's written instructions for stripping of temporary protective covering, cleaning, and touchup of minor finish damage. Remove and replace ceiling components that cannot be successfully cleaned and repaired to permanently eliminate evidence of damage, including dented and bent units.

END OF SECTION 095423

LINEAR METAL CEILINGS 095423 - 16