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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 /> 1. Use tamper-resistant screws for exposed fasteners unless otherwise indicated. <br /> 2. For fastening aluminum,use aluminum or 300 series stainless-steel fasteners. <br /> 3. For fastening galvanized steel,use hot-dip-galvanized steel or 300 series stainless-steel fasteners. <br /> 4. For fastening stainless steel,use 300 series stainless-steel fasteners. <br /> 5. For color-finished louvers,use fasteners with heads that match color of louvers. <br /> F. Postinstalled Fasteners for Concrete and Masonry: Torque-controlled expansion anchors, made from <br /> stainless-steel components, with capability to sustain, without failure, a load equal to 4 times the loads <br /> imposed, for concrete, or 6 times the load imposed, for masonry, as determined by testing per <br /> ASTM E 488, conducted by a qualified independent testing agency. <br /> G. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D 1187. <br /> 2.2 FABRICATION, GENERAL <br /> A. Assemble louvers in factory to minimize field splicing and assembly. Disassemble units as necessary <br /> for shipping and handling limitations. Clearly mark units for reassembly and coordinated installation. <br /> B. Vertical Assemblies: Where height of louver units exceeds fabrication and handling limitations, <br /> fabricate units to permit field-bolted assembly with close-fitting joints in jambs and mullions,reinforced <br /> with splice plates. <br /> 1. Continuous Vertical Assemblies: Fabricate units without interrupting blade-spacing pattern <br /> unless horizontal mullions are indicated. <br /> C. Maintain equal louver blade spacing, including separation between blades and frames at head and sill,to <br /> produce uniform appearance. <br /> D. Fabricate frames, including integral sills, to fit in openings of sizes indicated, with allowances made for <br /> fabrication and installation tolerances, adjoining material tolerances, and perimeter sealant joints. <br /> 1. Frame Type: Interior flange unless otherwise indicated. <br /> E. Include supports, anchorages, and accessories required for complete assembly. <br /> F. Provide vertical mullions of type and at spacings indicated, but not more than recommended by <br /> manufacturer, or 72 inches o.c.,whichever is less. <br /> 1. Semirecessed Mullions: Where indicated, provide mullions partly recessed behind louver blades <br /> so louver blades appear continuous. Where length of louver exceeds fabrication and handling <br /> limitations, fabricate with interlocking split mullions and close-fitting blade splices designed to <br /> permit expansion and contraction. <br /> 2. Exterior Corners: Prefabricated corner units with mitered and welded blades and with <br /> semirecessed mullions at corners. <br /> G. Provide subsills made of same material as louvers or extended sills for recessed louvers. <br /> H. Join frame members to each other and to fixed louver blades with fillet welds concealed from view <br /> unless otherwise indicated or size of louver assembly makes bolted connections between frame <br /> members necessary. <br /> LOUVERS AND VENTS 089000 -4 <br />