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Rothenberg Architecture Sw Regional Park 11/11/2010 Administration Facilities Concrete Formwork 031000-1

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Rothenberg Architecture Sw Regional Park 11/11/2010 Administration Facilities Concrete Formwork 031000-1 ROTHENBERG ARCHITECTURE SW REGIONAL PARK 11/11/2010 ADMINISTRATION FACILITIES SECTION 031000 CONCRETE FORMWORK PART 1 - GENERAL 1.01 SECTION INCLUDES A. Formwork for cast-in-place concrete, with shoring, bracing and anchorage. B. Openings for other work. C. Form accessories. D. Form stripping. 1.02 RELATED SECTIONS A. Section 032000 - Concrete Reinforcement. B. Section 033000 - Cast-in-Place Concrete. C. Section 072600 - Under - Slab Vapor Barrier 1.03 REFERENCES A. American Concrete Institute (ACI): 1 . ACI 117-90 Specifications for Tolerances for Concrete Construction and Materials. 2. ACI 301-96 Specification for Structural Concrete for Buildings. 3. ACI 318-95 Building Code Requirements for Reinforced Concrete. 4. ACI 347 -(R94) Recommended Practice For Concrete Formwork. B. American Plywood Association (APA): 1. APA Plywood Design Specification, Form No. Y51 OL, August, 1986. 2. APA Design/Construction Guide, Concrete Forming, Form No. V345S, Sept, 1996. C. National Forest Products Association (NFPA). 1. National Design Specification for Wood Construction, 1986 Editions with 1990 Revisions. 2, Design Values for Wood Construction, January 1986, with 1990 Revisions. 1 .04 CONTRACTOR RESPONSIBILITY A. Formwork design and engineering. B. Construction of formwork, shoring, removal of forms, and re-shoring. C. Providing a safe structure at all times and insuring safety to human life and property. 1.05 DESIGN REQUIREMENTS: A. General: In accordance with the references. B. Design: Design formwork to withstand applicable hydrostatic pressure of concrete plus dead weight, construction loads and vibrations. B. Limit deflection of studs and whalers to 1/400 of the span for architectural concrete and 1/360 of the span for other concrete. limit deflection of form facing material exposed to view to 1/240 of the span. C. Build adequate supports into forms for: 1. load concentrations 2. external vibrations CONCRETE FORMWORK 031000-1 ROTHENBERG ARCHITECTURE SW REGIONAL PARK 11/11/2010 ADMINISTRATION FACILITIES 1.06 SUBMITTALS A. Submit under provisions of Section 01300. B. Shop Drawings: 1. location of columns and beams by dimension. 2. Use the structural member designation system used on the Drawings. 3. Joint locations and details. 4. Size and locations of sleeves, blockouts, and slab penetrations. Shoring and support layout. 5. Reshoring layout. 6. Indicate: a. Form materials, types, and thickness. b. Form tying system and layout. c. Form accessories. d. Details to be used at sleeves, blockouts, and slab penetrations. e. Type and capacity of shores, supports, and reshores. 7. Reshoring procedure. 8. All shop drawings to be signed, dated and sealed by the formwork designer. 9. Product Data: Manufacturer's product specifications and installation instructions for manufactured products, including form sealer and release agent. 10. Concrete Strength Tests: Testing laboratory's reports for testing required in this Section. 1.07 QUALITY ASSURANCE A. Perform Work in accordance with ACI 301. B. Maintain one. copy of ACI 301 on site. 1.08 QUALIFICATIONS A. Form Work Designer: Design formwork under direct supervision of a Professional Structural Engineer experienced in design of this work and licensed in the State of Texas. 1.09 REGULATORY REQUIREMENTS A. Conform to ACI301 for design, fabrication, erection and removal of formwork. 1.10 DELIVERY, STORAGE, AND HANDLING A. Deliver, store, and handle formwork materials and accessories at the site to prevent any damage. Store formwork materials and accessories off ground in ventilated and protected manner to prevent deterioration from moisture. 1.11 COORDINATION A. Coordinate this Section with other Sections of work, which require attachment of components to formwork. CONCRETE FORMWORK 031000-2 ROTHENBERG ARCHITECTURE SW REGIONAL PARK 11/11/2010 ADMINISTRATION FACILITIES B. If formwork is placed after reinforcement results in concrete cover over reinforcement that is insufficient, request instructions from Architect/Engineer before proceeding. PART 2 - PRODUCTS 2.01 WOOD FORM MATERIALS A. Plywood: APA B-B Plyform Class I, Exterior Grade, mill oiled and edge sealed. B. Lumber: Southern Pine species; Select Structural No. 2 grade or better with grade stamp clearly visible, and conforming to NFPA design values for visually graded lumber .. 2.02 PREFABRICATED FORMS A. Preformed Steel Forms: Minimum 16 gage matched, tight fitting and stiffened to support weight of concrete without deflection detrimental to tolerances and appearance of finished surfaces. 2.03 FORMWORK ACCESSORIES A. Form Release Agent: 1. EUCO-SUP, Euclid Chemical Company. 2. DUOGARD, W.R. Meadows, Inc. 3. DEBOND, l&M Chemical Company B. Corners: Chamfered using wooden strip. PART 3 - EXECUTION 3.01 EXAMINATION A. Verification of Conditions: Examine substrate and conditions under which concrete formwork is to be performed. Have the installer notify the Contractor in writing, with a copy to the Architect, if substrate is unsatisfactory. Do not begin the work until unsatisfactory conditions have been corrected in a manner acceptable to installer. Beginning of work indicates acceptance of the substrate as satisfactory by the installer. 3.02 INSTALLATION A. General: In accordance with ACI 301, Design, erect, support, brace and maintain formwork to support vertical and lateral loads which might be applied until such loads can be supported by the concrete structure. 1. Construct formwork so that concrete members and structures are of correct size, shape, alignment, elevation and position. 2. Form Construction: a. Fabrication: Fabricate forms for easy removal without hammering or prying against concrete surfaces. b. Provide crush plates or wrecking plates where stripping may damage cost concrete surfaces. c. Provide top forms for inclined surfaces where slope is too steep to place concrete with bottom forms only. CONCRETE FORMWORK 031000-3 ROTHENBERG ARCHITECTURE SW REGIONAL PARK 11/11/2010 ADMINISTRATION FACILITIES d. Form exposed corners of beams and columns with beveled chamfer strips. e. Kerf wood inserts for forming keyways, reglets, and recesses to ease removal. f. Provide camber in formwork as indicated on the Drawings. 3. Support: Provide bracing to ensure stability of formwork. a. Erect and maintain bracing to support vertical, lateral, and asymmetrical loads until such loading can be supported by inplace concrete structures. b. Provide shores and struts with means of adjustment capable of taking up formwork settlement occurring during placement of concrete, using wedges, jacks, or a combination there of. 4. Provisions for Other Trades: a. Provide openings in concrete formwork to accommodate work of other trades. b. Accurately place and securely support items to be built into forms. 5. Temporary Openings: a. Provide temporary openings in formwork where interior area IS inaccessible for: Clean out. b. Inspection before concrete placement. c. Concrete placement. d. Provide temporary openings at the base of column and wall forms. e. Position temporary openings in an inconspicuous location. f. Brace closures of temporary openings and set tightly to forms to prevent loss of concrete mortar. g. Preparation and Tightening: Thoroughly clean forms and adjacent surfaces to receive concrete. i. Form Surface Treatment: a. Before placing reinforcing steel or concrete, coat the form surfaces with a material that will effectively prevent absorption of moisture, prevent bond with concrete, and not stain concrete. b. A field applied form release agent or factory applied nonabsorptive liner may be used. c. Do not allow form release agent to stand in puddles, come into contact with reinforcing steel or hardened concrete against which fresh concrete is to be placed. d. Remove loose metal, wood chips, sawdust, dirt, trash, and other debris just prior to concrete placement. ii. Re-tighten forms during and immediately after concrete placement to eliminate mortar leaks. B. Installation Tolerances: 1 . Construct formwork in accordance with tolerances specified in ACI 117. CONCRETE FORMWORK 031000-4 ROTHENBERG ARCHITECTURE SW REGIONAL PARK 11/11/2010 ADMINISTRATION FACILITIES 2. Regardless of specified tolerances construct building so that no part extends beyond the legal boundaries of the project. C. Installation of Embedded Items: 1. General: Set and build into the work anchorage devices, inserts, and other embedded items required for material attached to or supported by cast-in-place concrete. 2. Use setting drawings, diagrams, instructions, and directions provided by suppliers of the items to be attached. 3. Do not place embedded items in any manner that will displace or interfere with the reinforcing steel 4. Conduit: Embed all electrical conduit in slabs. 5. Wire conduit inside layers of reinforcement. 6. Wire conduit to reinforcement perpendicular to the conduit. Do not wire to parallel reinforcement. 7. Separate parallel conduit by 2 inches, minimum. 8. Waterstops: Install in greatest .continuous lengths possible. Do not displace concrete reinforcement. a. Splice waterstops in accordance with manufacturer's recommendations. 9. Junction Boxes: a. Boxes of any depth may be located in slabs, beam soffits, and headers. b. Do not locate in joist soffits. c. Provide header to accommodate junction boxes over 2 1/4 inches deep. D. Removal of Forms: 1. Formwork supporting weight of concrete: Including but not limited to beam, girder, and slab forms. a. Remove forms after concrete has attained 70% of its design compressive strength. b. Concrete strength is determined
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