Attachment 1: Specifications - Metropolitan Washington Airports ...

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DCA TERMINAL A IMPROVEMENTS (NEAR TERM) 10 AUGUST 2012 TASK ORDER 03: LOBBY IMPROVEMENTS – PKG 4 -CURBSIDE CHECK-IN RONALD REAGAN WASHINGTON NATIONAL AIRPORT PROJECT DT1203 d. Specified Technologies, Inc.; Smoke N Sound Acoustical Sealant. e. USG Corporation; SHEETROCK Acoustical Sealant. 2. Acoustical joint sealant shall have a VOC content of 250 g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24). E. Thermal Insulation: As specified in Section 072100 "Thermal Insulation." F. Vapor Retarder: As specified in Section 072100 "Thermal Insulation." 2.8 TEXTURE FINISHES A. Primer: As recommended by textured finish manufacturer. B. Polystyrene Aggregate Ceiling Finish: Water-based, job-mixed, polystyrene aggregate finish with flame-spread and smoke-developed indexes of not more than 25 when tested according to ASTM E 84. 1. Products: Subject to compliance with requirements, or as acceptable to the Authority, provide product indicated on Drawings or comparable product. Products may be provided by, but are not limited to, one of the following: a. Georgia-Pacific Gypsum LLC; ToughRock Ceiling Textures/Polystyrene. b. National Gypsum Company; ProForm Perfect Spray. c. USG Corporation; SHEETROCK Ceiling Spray Texture, QT. 2. Texture: Match existing. PART 3 - EXECUTION 3.1 APPLYING AND FINISHING PANELS A. Comply with ASTM C 840. B. Examine panels before installation. Reject panels that are wet, moisture damaged, and mold damaged. C. Isolate perimeter of gypsum board applied to non-load-bearing partitions at structural abutments, except floors. Provide 1/4- to 1/2-inch-wide spaces at these locations and trim edges with edge trim where edges of panels are exposed. Seal joints between edges and abutting structural surfaces with acoustical sealant. D. Install trim with back flanges intended for fasteners, attach to framing with same fasteners used for panels. Otherwise, attach trim according to manufacturer's written instructions. 1. Aluminum Trim: Install in locations indicated on Drawings. GYPSUM BOARD 09 29 00 - 4
DCA TERMINAL A IMPROVEMENTS (NEAR TERM) 10 AUGUST 2012 TASK ORDER 03: LOBBY IMPROVEMENTS – PKG 4 -CURBSIDE CHECK-IN RONALD REAGAN WASHINGTON NATIONAL AIRPORT PROJECT DT1203 2. Control Joints: Install control joints according to ASTM C 840 and in specific locations approved by COTR for visual effect. E. Prefill open joints and damaged surface areas. F. Apply joint tape over gypsum board joints, except for trim products specifically indicated as not intended to receive tape. G. Gypsum Board Finish Levels: Finish panels to levels indicated below and according to ASTM C 840: 1. Level 1: Ceiling plenum areas, concealed areas, and where indicated. 2. Level 4: At panel surfaces that will be exposed to view unless otherwise indicated. a. Primer and its application to surfaces are specified in Section 099123 "Interior Painting." H. Texture Finish Application: Prepare and apply primer to gypsum panels and other surfaces receiving texture finishes. Mix and apply finish using powered spray equipment, to produce a uniform texture matching approved mockup and free of starved spots or other evidence of thin application or of application patterns. I. Protect adjacent surfaces from drywall compound and texture finishes and promptly remove from floors and other non-drywall surfaces. Repair surfaces stained, marred, or otherwise damaged during drywall application. J. Remove and replace panels that are wet, moisture damaged, and mold damaged. PART 4 - CONTRACTOR’S QUALITY CONTROL REQUIREMENTS 4.1 GENERAL A. Comply with applicable provisions of Division 01 Section “Quality Requirements” for requirements for Contractor Quality Control Program. END OF SECTION 09 29 00 GYPSUM BOARD 09 29 00 - 5
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TECHNICAL SPECIFICATIONS VOLUME I O
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