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 2.2 FIRE-RETARDANT-TREATED MATERIALS A. Fire-Retardant-Treated Lumber and Plywood by Pressure Process: Products with a flame spread index of 25 or less when tested according to ASTM E 84, and with no evidence of significant progressive combustion when the test is extended an additional 20 minutes, and with the flame front not extending more than 10.5 feet beyond the centerline of the burners at any time during the test. 1. Exterior Type: Treated materials shall comply with requirements specified above for fire-retardant-treated lumber and plywood by pressure process after being subjected to accelerated weathering according to ASTM D 2898. Use for exterior locations and where indicated. 2. Interior Type A: Treated materials shall have a moisture content of 28 percent or less when tested according to ASTM D 3201 at 92 percent relative humidity. Use where exterior type is not indicated. 3. Design Value Adjustment Factors: Treated lumber shall be tested according ASTM D 5664, and design value adjustment factors shall be calculated according to ASTM D 6841. B. Kiln-dry lumber after treatment to a maximum moisture content of 19 percent. Kiln-dry plywood after treatment to a maximum moisture content of 15 percent. C. Identify fire-retardant-treated wood with appropriate classification marking of testing and inspecting agency acceptable to authorities having jurisdiction. D. Application: Treat all miscellaneous carpentry unless otherwise indicated. 1. Concealed blocking. 2. Plywood backing panels. 2.3 MISCELLANEOUS LUMBER A. General: Provide miscellaneous lumber indicated and lumber for support or attachment of other construction, including the following: 1. Blocking. 2. Nailers. B. For items of dimension lumber size, provide No. 2 grade lumber of any species. 2.4 PLYWOOD BACKING PANELS A. Backing Panels: DOC PS 1, Exposure 1, C-D Plugged, fire-retardant treated, in thickness indicated or, if not indicated, not less than 1/2-inch nominal thickness. MISCELLANEOUS ROUGH CARPENTRY 06 10 53 - 2
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 2.5 FASTENERS A. General: Provide fasteners of size and type indicated that comply with requirements specified in this article for material and manufacture. 1. Where carpentry is exposed to weather, in ground contact, pressure-preservative treated, or in area of high relative humidity, provide fasteners with hot-dip zinc coating complying with ASTM A 153/A 153M. B. Power-Driven Fasteners: NES NER-272. C. Screws for Fastening to Metal Framing: ASTM C 954, length as recommended by screw manufacturer for material being fastened. 2.6 MISCELLANEOUS MATERIALS A. Flexible Flashing: Self-adhesive butyl rubber compound, bonded to a high-density polyethylene film, aluminum foil, or spunbonded polyolefin to produce an overall thickness of not less than 0.025 inch. PART 3 - EXECUTION 3.1 INSTALLATION, GENERAL A. Set carpentry to required levels and lines, with members plumb, true to line, cut, and fitted. Fit carpentry to other construction; scribe and cope as needed for accurate fit. B. Where wood-preservative-treated lumber is installed adjacent to metal decking, install continuous flexible flashing separator between wood and metal decking. C. Framing Standard: Comply with AF&PA's WCD 1, "Details for Conventional Wood Frame Construction," unless otherwise indicated. D. Install plywood backing panels by fastening to studs; coordinate locations with utilities requiring backing panels. Install fire-retardant treated plywood backing panels with classification marking of testing agency exposed to view. E. Do not splice structural members between supports unless otherwise indicated. F. Comply with AWPA M4 for applying field treatment to cut surfaces of preservative-treated lumber. G. Securely attach carpentry work to substrate by anchoring and fastening as indicated, complying with the following: 1. NES NER-272 for power-driven fasteners. 2. Table 2304.9.1, "Fastening Schedule," in ICC's International Building Code. MISCELLANEOUS ROUGH CARPENTRY 06 10 53 - 3
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Attachment 1: Specifications - Metropolitan Washington Airports ...

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