SECTION (09265) - GYPSUM BOARD SHAFT WALL ASSEMBLIES

Transcription

1 SECTION (09265) - GYPSUM BOARD SHAFT WALL ASSEMBLIES PART 1 GENERAL 1.01 SUMMARY A. Section Includes: 1. Shaft Enclosures 2. Chase Enclosures 3. Stair Enclosures B. Related Sections: 1.02 DEFINITIONS 1. Section (07480) - Firestopping 2. Section (07920) Joint Sealants 3. Section (09255) - Gypsum Board Assemblies 4. Section (09900) - Painting A. Gypsum Board Construction Terminology: Refer to ASTM C1396 for definitions of terms for gypsum board construction not defined in this Section or in other referenced standards REFERENCES A. ASTM International (ASTM) Publications: 1. A653 "Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process" 2. C442 Standard Specification Gypsum Backing Board, Gypsum Coreboard, and Gypsum Shaftliner Board 3. C475 Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board 4. C645 Standard Specification for Nonstructural Steel Framing Members 5. C754 Standard Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products 6. C834 Standard Specification for Latex Sealants 7. C840 Standard Specification for Application and Finishing of Gypsum Board 8. C919 Standard Practice for Use of Sealants in Acoustical Applications 9. C954 Standard Specification for Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studs from in. to in. in Thickness 10. C1002 Standard Specification for Steel Self-Piercing Tapping Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Wood Studs or Steel Studs 11. C1047 Standard Specification for Accessories for Gypsum Wallboard and Gypsum Veneer Base 12. C1278 Standard Specification for Fiber-Reinforced Gypsum Panel" PAGE 1 FILE: _23-CFRST-Gypsum Board Shaft Wall Assemblies REVISED: 05/05/ , Marriott International, Inc. CFRST SPECMSTR-NEW BUILD

2 13. C1325 Standard Specification for Non-Asbestos Fiber-Mat Reinforced Cement Interior Substrate Sheets 14. C1396 Standard Specification for Gypsum Board 15. D3273 "Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber" 16. E72 Standard Test Methods of Conducting Strength Tests of Panels for Building Construction 17. E84 Standard Test Method for Surface Burning Characteristics of Building Materials 18. E90 Standard Test Method for Laboratory Measurement of Airborne Sound Transmission Loss of Building Partitions and Elements 19. E119 "Standard Test Methods for Fire Tests of Building Construction and Materials" 20. E413 Classification for Rating Sound Insulation B. FM Global (FM) Standards: 1. "Approval Guide, Building Products" C. Underwriters Laboratory (UL): 1. "Fire Resistance Directory" 2. UL 723 Test for Surface Burning Characteristics of Building Materials D. United States Gypsum Co. (USG): 1. "Gypsum Construction Handbook" E. U.S. Consumer Product Safety Commission (CPSC): 1. CPSC Staff Preliminary Evaluation of Drywall Chamber Test Results by the Lawrence Berkeley National Laboratory (LBNL) PERFORMANCE REQUIREMENTS A. Structural Performance: 1.05 SUBMITTALS 1. Provide gypsum board shaft-wall assemblies capable of withstanding the full air-pressure loads indicated for maximum heights of partitions without failing and while maintaining an airtight and smoke-tight seal. Evidence of failure includes deflections exceeding limits indicated, bending stresses causing studs to break or to distort, and end-reaction shear causing track (runners) to bend or to shear and studs to become crippled. A. General: Submit the following in accordance with Conditions of Contract and Division 01 Specification Sections. B. Product Data: Submit Letter of Conformance in accordance with Section (01330) indicating specified items selected for use in project with the following supporting data. C. Product Data: For each type of product specified. 1. Fire-Test-Response Reports: From a qualified independent testing and inspecting agency substantiating each gypsum board shaft-wall assembly's required fire-resistance rating. a. Include data substantiating that elevator entrances and other items that penetrate each gypsum board shaft-wall assembly do not negate fire-resistance rating. PAGE 2 REVISED: 05/05/14 FILE: _23-CFRST-Gypsum Board Shaft Wall Assemblies CFRST SPECMSTR-NEW BUILD 2014, Marriott International, Inc.

3 1.06 QUALITY ASSURANCE A. Fire-Resistance Ratings: Where indicated, provide materials and construction which are identical to those of assemblies whose fire-resistance rating has been determined per ASTM E119 by a testing and inspecting organization acceptable to authorities having jurisdiction. 1. Provide fire-resistance-rated assemblies identical to those indicated by reference to GA 600 "Fire Resistance Design Manual", to design designations in U.L. "Fire Resistance Directory", to FMG s Approval Guide, Building Products, or in listing of other testing and agencies acceptable to authorities having jurisdiction. B. Sound Transmission Characteristics: For gypsum board shaft-wall assemblies indicated to have STC ratings, provide assembly materials and construction complying with requirements of assemblies whose STC ratings were determined per ASTM E90 and classified per ASTM E413 by a qualified independent testing agency. C. Gypsum board products shall contain low or no detectable emissions of hydrogen sulfide or other harmful chemicals as determined according to testing by the U.S. Consumer Product Safety Commission (CPSC) 1.07 DELIVERY, STORAGE, AND HANDLING A. Deliver materials in original packages, containers, and bundles bearing brand name and identification of manufacturer or supplier. B. Store materials inside under cover and keep them dry and protected against damage from weather, direct sunlight, surface contamination, corrosion, construction traffic, and other causes. Stack gypsum panels flat on leveled supports off the ground to prevent sagging. C. Handle gypsum board to prevent damage to edges, ends, and surfaces. Do not bend or otherwise damage metal corner beads and trim. D. Protect cold-formed metal framing from corrosion, deformation, and other damage during delivery, storage, and handling as required in AISI's " Code of Standard Practice for Cold- Formed Steel Structural Framing" PROJECT CONDITIONS A. Comply with requirements for environmental conditions, room temperatures, and ventilation specified in Section (09255) - Gypsum Board Assemblies. PART 2 PRODUCTS 2.01 MANUFACTURERS A. Avendra, LLC Preferred Manufacturers: 1. None B. Approved Manufacturers: 1. G-P Gypsum Corporation ( ) 2. National Gypsum Company, Gold Bond Building Products Div. ( ) 3. United States Gypsum Co. ( ) 4. CertainTeed Corporation, a subsidiary of Saint-Gobain ( ) 5. Temple-Inland Forest Products Corp. - Gypsum Products ( ) 6. ClarkDietrich Building Systems LLC ( ) PAGE 3 FILE: _23-CFRST-Gypsum Board Shaft Wall Assemblies REVISED: 05/05/ , Marriott International, Inc. CFRST SPECMSTR-NEW BUILD

4 2.02 ASSEMBLY MATERIALS A. General: Provide materials and components complying with requirements of fire-resistancerated assemblies indicated. 1. Provide panels in maximum lengths available to eliminate or minimize end-to-end butt joints. 2. Provide auxiliary materials complying with gypsum board shaft-wall assembly manufacturer's written recommendations. B. Steel Framing: Comply with ASTM C645 requirements for metal and ASTM C754 for conditions indicated. 1. Protective Coating: G40 (Z120) hot-dipped galvanized steel, complying with ASTM A1003 or ASTM A653, or equivalent corrosion resistant coating. A40 gavannealed products are not acceptable. 2. Studs: Manufacturer's standard profile for repetitive members and corner and end members and for fire-resistance-rated assembly indicated. a. Thickness: As shown on Drawings b. Depth: As shown on Drawings 3. Runners (Tracks): a. Depth: J-Profile track with manufacturer s standard long leg length, but at least 2- inches long and matching studs in depth. b. Thickness: Track thickness to match wall stud thickness, unless otherwise indicated. c. Provide firestop track at locations as shown on Drawings. C. Firestop Tracks: Top runner manufactured to allow partition heads to expand and contract with movement of the structure while maintaining continuity of fire-resistance-rated assembly indicated; in thickness not less than indicated for studs and in width to accommodate depth of studs. D. Jamb Struts: Manufacturer's standard J-profile strut with long-leg length of 3 inches, in depth matching studs, and not less than inch thick. E. Backing Plate: Proprietary fire-resistance-treated blocking and bracing in width indicated. F. Flat Strap and Backing Plate: Steel sheet for blocking and bracing in length and width indicated. 1. Minimum Base-Metal Thickness: Gypsum Shaft-Liner Panels: 2. Acceptable Manufacturer: a. Dens-Glass Ultra Shaftliner ; G-P Gypsum Corporation b. Sheetrock Gypsum Liner Panels Mold Tough ; United States Gypsum Co c. GreenGlass Liner Panels ; Temple-Inland Forest Products Corp. - Gypsum Products ( ) 3. Type X or SLX, 1 thick water resistant gypsum core surfaced with coated glass mat facings that resist growth of mold and mildew and does not support fungus growth per ASTM D3273 "Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber". PAGE 4 REVISED: 05/05/14 FILE: _23-CFRST-Gypsum Board Shaft Wall Assemblies CFRST SPECMSTR-NEW BUILD 2014, Marriott International, Inc.

5 G. Gypsum Wallboard: ASTM C1396, core type as required by fire-resistance-rated assembly indicated. 1. Refer to Section (09255) - Gypsum Board Assemblies H. Accessories: Cornerbead, edge trim, and control joints of material and shapes specified in Section (09255) - Gypsum Board Assemblies, that comply with gypsum board shaftwall assembly manufacturer's written recommendations for application indicated. I. Gypsum Wallboard Joint-Treatment Materials: ASTM C475 and as specified in Section (09255) - Gypsum Board Assemblies. J. Steel Drill Screws: ASTM C1002, unless otherwise indicated. 1. Use screws complying with ASTM C954 for fastening panels to steel members from to inch thick. K. Track (Runner) Fasteners: Power-driven fasteners of size and material required to withstand loading conditions imposed on shaft-wall assemblies without exceeding allowable design stress of track, fasteners, or structural substrates in which anchors are embedded. L. Acoustical Sealant: As specified in Section (09255) - Gypsum Board Assemblies GYPSUM BOARD SHAFT WALL A. Basis-of-Design Product: As indicated on Drawings by design designation of a qualified testing and inspecting agency. B. STC Rating: As indicated on Drawings. PART 3 EXECUTION 3.01 EXAMINATION A. Examine substrates to which gypsum board shaft-wall assemblies attach or abut, with Installer present, including hollow-metal frames, elevator hoistway door frames, cast-in anchors, and structural framing. Examine for compliance with requirements for installation tolerances and other conditions affecting performance. Proceed with installation only after unsatisfactory conditions have been corrected INSTALLATION A. General: Install gypsum board shaft-wall assemblies to comply with requirements of fireresistance-rated assemblies indicated, manufacturer's written installation instructions, and the following: 1. ASTM C754 for installing steel framing. 2. Section (09255) - Gypsum Board Assemblies, for applying and finishing panels. B. Do not bridge building expansion joints with shaft-wall assemblies; frame both sides of joints with furring and other support. C. Install supplementary framing in gypsum board shaft-wall assemblies around openings and as required for blocking, bracing, and support of gravity and pullout loads of fixtures, equipment, services, heavy trim, furnishings, and similar items that cannot be supported directly by shaftwall assembly framing. 1. At elevator hoistway door frames, provide jamb struts on each side of door frame. 2. Where handrails directly attach to gypsum board shaft-wall assemblies, provide galvanized steel reinforcing strip, accurately positioned and secured behind at least 1 face-layer panel. Size of reinforcing plate as shown on Drawings. PAGE 5 FILE: _23-CFRST-Gypsum Board Shaft Wall Assemblies REVISED: 05/05/ , Marriott International, Inc. CFRST SPECMSTR-NEW BUILD

6 D. Integrate stair hanger rods with gypsum board shaft-wall assemblies by locating cavity of assemblies where required to enclose rods. E. At penetrations in shaft wall, maintain fire-resistance rating of shaft-wall assembly by installing supplementary steel framing around perimeter of penetration and fire protection behind boxes containing wiring devices, elevator call buttons, elevator floor indicators, and similar items. F. Isolate gypsum finish panels from building structure to prevent cracking of finish panels while maintaining continuity of fire-rated construction. G. Install control joints to maintain fire-resistance rating of assemblies. H. Seal gypsum board shaft walls with acoustical sealant at perimeter of each assembly where it abuts other work and at joints and penetrations within each assembly. Install acoustical sealant to withstand dislocation by air-pressure differential between shaft and external spaces; maintain an airtight and smoke-tight seal; and comply with manufacturer's written instructions or ASTM C919, whichever is more stringent. I. In elevator shafts where gypsum board shaft-wall assemblies cannot be positioned within 2 inches of the shaft face of structural beams, floor edges, and similar projections into shaft, install 5/8-inch-thick, gypsum board cants covering tops of projections. 1. Slope cant panels at least 75 degrees from horizontal. Set base edge of panels in adhesive and secure top edges to shaft walls at 24 inches o.c. with screws fastened to shaft-wall framing. 2. Where steel framing is required to support gypsum board cants, install framing at 24 inches o.c. and extend studs from the projection to the shaft-wall framing. END OF SECTION PAGE 6 REVISED: 05/05/14 FILE: _23-CFRST-Gypsum Board Shaft Wall Assemblies CFRST SPECMSTR-NEW BUILD 2014, Marriott International, Inc.