Loading...
HomeMy WebLinkAbout09265.pdf BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD SHAFT-WALL ASSEMBLIES 09265 - 1 SECTION 09265 - GYPSUM BOARD SHAFT-WALL ASSEMBLIES 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. Section Includes: Gypsum board shaft wall assemblies. 1.3 ACTION SUBMITTALS A. Product Data: For each component of gypsum board shaft wall assembly. 1.4 DELIVERY, STORAGE, AND HANDLING A. Store materials inside under cover and keep them dry and protected against weather, condensation, direct sunlight, construction traffic, and other potential causes of damage. Stack panels flat and supported on risers on a flat platform to prevent sagging. 1.5 FIELD CONDITIONS A. Environmental Limitations: Comply with ASTM C 840 requirements or with gypsum board manufacturer's written recommendations, whichever are more stringent. B. Do not install interior products until installation areas are enclosed and conditioned. C. Do not install panels that are wet, moisture damaged, or mold damaged. 1. Indications that panels are wet or moisture damaged include, but are not limited to, discoloration, sagging, and irregular shape. 2. Indications that panels are mold damaged include, but are not limited to, fuzzy or splotchy surface contamination and discoloration. PART 2 - PRODUCTS 2.1 PERFORMANCE REQUIREMENTS A. Fire-Resistance-Rated Assemblies: For fire-resistance-rated assemblies, provide materials and construction identical to those tested in assembly indicated according to ASTM E 119 by an independent testing agency. BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD SHAFT-WALL ASSEMBLIES 09265 - 2 2.2 GYPSUM BOARD SHAFT WALL ASSEMBLIES A. Fire-Resistance Rating: As indicated on drawings. B. Studs: Manufacturer's standard profile for repetitive members, corner and end members, and fire-resistance-rated assembly indicated. 1. Depth: As indicated. 2. Minimum Base-Metal Thickness: As indicated. C. Runner Tracks: Manufacturer's standard J-profile track with manufacturer's standard long-leg length, but at least 2 inches (51 mm) long and matching studs in depth. 1. Minimum Base-Metal Thickness: As indicated. 2.3 PANEL PRODUCTS A. Panel Size: Provide in maximum lengths and widths available that will minimize joints in each area and that correspond with support system indicated. 2.4 NON-LOAD-BEARING STEEL FRAMING A. Steel Framing Members: Comply with ASTM C 645 requirements for metal unless otherwise indicated. 1. Protective Coating: Coating with equivalent corrosion resistance of ASTM A 653/A 653M, G40 (Z120) unless otherwise indicated. 2.5 AUXILIARY MATERIALS A. General: Provide auxiliary materials that comply with manufacturer's written recommendations. B. Trim Accessories: Cornerbead, edge trim, and control joints of material and shapes as specified in Division 9 Section "Gypsum Board" that comply with gypsum board shaft wall assembly manufacturer's written recommendations for application indicated. C. Steel Drill Screws: ASTM C 1002 unless otherwise indicated. D. Track 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. 1. Expansion Anchors: Fabricated from corrosion-resistant materials, with capability to sustain, without failure, a load equal to 5 times design load, as determined by testing according to ASTM E 488 conducted by a qualified testing agency. PART 3 - EXECUTION 3.1 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 BICKFORD OF CARMEL, IN 12/12/2012 GYPSUM BOARD SHAFT-WALL ASSEMBLIES 09265 - 3 structural framing. Examine for compliance with requirements for installation tolerances and other conditions affecting performance. B. Examine panels before installation. Reject panels that are wet, moisture damaged, or mold damaged. C. Proceed with installation only after unsatisfactory conditions have been corrected. 3.2 INSTALLATION A. General: Install gypsum board shaft wall assemblies to comply with requirements of fire- resistance-rated assemblies indicated, manufacturer's written installation instructions, and ASTM C 754 other than stud-spacing requirements. B. Do not bridge building expansion joints with shaft wall assemblies; frame both sides of expansion 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, wall-mounted door stops, and similar items that cannot be supported directly by shaft wall assembly framing. 1. Reinforcing: Where handrails directly attach to gypsum board shaft wall assemblies, provide galvanized steel reinforcing strip with 0.033-inch (0.84-mm) minimum thickness of base metal (uncoated), accurately positioned and secured behind at least one layer of face panel. D. Penetrations: 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. E. Isolate perimeter of gypsum panels from building structure to prevent cracking of panels, while maintaining continuity of fire-rated construction. F. Control Joints: Install control joints according to ASTM C 840 and in specific locations approved by Architect while maintaining fire-resistance rating of gypsum board shaft wall assemblies. G. Installation Tolerance: Install each framing member so fastening surfaces vary not more than 1/8 inch (3 mm) from the plane formed by faces of adjacent framing. 3.3 PROTECTION A. Protect installed products from damage from weather, condensation, direct sunlight, construction, and other causes during remainder of the construction period. B. Remove and replace panels that are wet, moisture damaged, or mold damaged. 1. Indications that panels are wet or moisture damaged include, but are not limited to, discoloration, sagging, and irregular shape. 2. Indications that panels are mold damaged include, but are not limited to, fuzzy or splotchy surface contamination and discoloration. END OF SECTION 09265