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CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12, 2020 <br />308 WEST FRANKLIN, CHAPEL HILL, NC <br />LOUVERS AND VENTS 089000 - 3 <br />D. Samples for Verification: For each type of metal finish required. <br />E. Delegated-Design Submittal: For louvers indicated to comply with structural and seismic performance <br />requirements and design criteria, including analysis data signed and sealed by the qualified professional <br />engineer responsible for their preparation. <br />F. Product Test Reports: Based on evaluation of comprehensive tests performed according to AMCA 500- <br />L by a qualified testing agency or by manufacturer and witnessed by a qualified testing agency, for each <br />type of louver and showing compliance with performance requirements specified. <br />1.6 QUALITY ASSURANCE <br />A. Source Limitations: Obtain louvers and vents from single source from a single manufacturer where <br />indicated to be of same type, design, or factory-applied color finish. <br />B. Welding: Qualify procedures and personnel according to the following: <br />1. AWS D1.2/D1.2M, "Structural Welding Code - Aluminum." <br />2. AWS D1.3, "Structural Welding Code - Sheet Steel." <br />3. AWS D1.6, "Structural Welding Code - Stainless Steel." <br />C. SMACNA Standard: Comply with recommendations in SMACNA's "Architectural Sheet Metal <br />Manual" for fabrication, construction details, and installation procedures. <br />D. UL and NEMA Compliance: Provide motors and related components for motor-operated louvers that <br />are listed and labeled by UL and comply with applicable NEMA standards. <br />1.7 PROJECT CONDITIONS <br />A. Field Measurements: Verify actual dimensions of openings by field measurements before fabrication. <br />PART 2 - PRODUCTS <br />2.1 MATERIALS <br />A. Aluminum Extrusions: ASTM B 221 (ASTM B 221M), Alloy 6063-T5, T-52, or T6. <br />B. Aluminum Sheet: ASTM B 209 (ASTM B 209M), Alloy 3003 or 5005 with temper as required for <br />forming, or as otherwise recommended by metal producer for required finish. <br />C. Aluminum Castings: ASTM B 26/B 26M, Alloy 319. <br />D. Galvanized-Steel Sheet: ASTM A 653/A 653M, G60 (Z180) zinc coating, mill phosphatized. <br />E. Stainless-Steel Sheet: ASTM A 240/A 240M, Type 304, No. 4 finish, with grain running perpendicular <br />to length of blades and frame members. Fasteners: Use types and sizes to suit unit installation <br />conditions. <br />DocuSign Envelope ID: 775B89AF-3514-4D9E-B148-2FDE4EFF16C2