Laserfiche WebLink
3.3 INSTALLATION, GENERAL <br />A. General: Anchor sheet metal roofing and other components of the Work securely in place, with <br />provisions for thermal and structural movement. Install fasteners, solder, welding rods, protective <br />coatings, separators, sealants, and other miscellaneous items as required for a complete roofing system <br />and as recommended by fabricator for sheet metal roofing. <br />1. Field cutting of sheet metal roofing by torch is not permitted. <br />2. Provide metal closures at peaks, rake edges, rake walls, eaves and each side of ridge and hip caps. <br />3. Flash and seal sheet metal roofing with closure strips at eaves, rakes, and perimeter of all <br />openings. Fasten with self -tapping screws. <br />4. Locate and space fastenings in uniform vertical and horizontal alignment. Predrill panels for <br />fasteners. <br />5. Install ridge and hip caps as sheet metal roofing work proceeds. <br />6. Locate roofing splices over, but not attached to, structural supports. Stagger roofing splices and <br />end laps to avoid a four -panel lap splice condition. Install backing plates at roofing splices. <br />7. Install sealant tape where indicated. <br />8. Lap metal flashing over sheet metal roofing to allow moisture to run over and off the material. <br />9. Do not use graphite pencils to mark metal surfaces. <br />B. Thermal Movement. Rigidly fasten metal roof panels to structure at only one location for each panel. <br />Allow remainder of panel to move freely for thermal expansion and contraction. <br />1. Point of Fixity: Fasten each panel along a single line of fixing located at eave, ridge and center of <br />panel length. <br />2. Avoid attaching accessories through roof panels in a manner that will inhibit thermal movement. <br />C. Fasteners: Use fasteners of sizes that will penetrate wood sheathing not less than 1-1/4 inches (32 mm) <br />for nails and not less than 3/4 inch (19 nun) for wood screws. <br />D. Metal Protection: Where dissimilar metals will contact each other or corrosive substrates, protect against <br />galvanic action by painting contact surfaces with bituminous coating, by applying self -adhering sheet <br />underlayment to each contact surface, or by other permanent separation as recommended by SMACNA. <br />E. Conceal fasteners and expansion provisions where possible in exposed work and locate to minimize <br />possibility of leakage. Cover and seal fasteners and anchors as required for a right installation. <br />F. Fasciae: Align bottom of sheet metal roofing and fasten with blind rivets, bolts, or self -tapping screws. <br />Flash and seal sheet metal roofing with closure strips where fasciae meet soffits, along lower panel edges, <br />and at perimeter of all openings. <br />3.4 ON-SITE, ROLL -FORMED SHEET METAL ROOFING INSTALLATION <br />A. General: Install on-site, roll -formed sheet metal roofing fabricated from UL -certified equipment to <br />comply with equipment manufacturer's written instructions for UL wind -uplift resistance class indicated. <br />Provide sheet metal roofing of full length from eave to ridge unless otherwise restricted by on-site or <br />shipping limitations. <br />B. Standing -Seam Sheet Metal Roofing: Fasten sheet metal roofing to supports with concealed clips at each <br />standing -seam joint at location, at spacing, and with fasteners recommended by manufacturer of portable <br />roll -forming equipment. <br />Wabasso Beach Park 07610-8 <br />Indian River County <br />DAA Project No. 6008 <br />