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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 - 4 <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 />DocuSign Envelope ID: 775B89AF-3514-4D9E-B148-2FDE4EFF16C2