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DocuSign Envelope ID:D561B1AE-DF34-4907-AD06-AOEB37BBE427 <br /> CHAPEL HILL ORANGE COUNTY VISITORS BUREAU August 12,2020 <br /> 308 WEST FRANKLIN,CHAPEL HILL,NC <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 26/13 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 /> LOUVERS AND VENTS 089000 - 3 <br />