Laserfiche WebLink
ROOFING REPLACEMENT PROJECT PAGE 3 <br />NORTH COUNTY REGIONAL PARK AQUATIC CENTER SECTION 076200 <br />JUNE 7, 2019 SHEET METAL AND FLASHINGS <br />components, failure of joint sealants, failure of connections, and other detrimental <br />effects. Base calculations on surface temperatures of materials due to both solar heat <br />gain and nighttime -sky heat loss. <br />Temperature Change: 120 deg F (67 deg C), ambient; 180 deg F (100 deg C), <br />material surfaces. <br />2.2 SHEET METALS <br />A. General: Protect mechanical and other finishes on exposed surfaces from damage by <br />applying strippable, temporary protective film before shipping. <br />B. Stainless Steel Sheet: ASTM A240/A240M, Type 304, dead soft, fully annealed; with <br />smooth, flat surface. <br />1. Finish: ASTM A480/A480M, No. 2D (dull, cold rolled) or shop pre -coated with <br />PVDF coating; color to match roof and wall panels. <br />C. Aluminum Sheet: ASTM B 209 (ASTM B 209M), alloy as standard with manufacturer <br />for finish required, with temper as required to suit forming operations and performance <br />required; with smooth surface. <br />1. Finish: Shop pre -coated with PVDF coating; custom color to match roof and wall <br />panels. <br />D. Sheet metal fastenings: <br />1. Rivets, nails, sheet metal screws, machine screws, self -tapping screws, and <br />stove bolts, of the types and size best adapted to conditions of use. <br />a. Stainless steel: Use Type 302 stainless steel or other type to match <br />stainless steel being fastened. <br />2. Pop rivets, by United Shoe Machinery Corp., may be used for metal -to -metal <br />connections when future disassembly is not required. Open-end type may be <br />used for all applications except where watertight connections are required, in <br />which case use closed-end type. Use pop rivets made from same type material <br />as metals to be fastened. <br />2.3 UNDERLAYMENT MATERIALS <br />A. Self -Adhering, High -Temperature Sheet Underlayment: Minimum 30 mils (0.76 mm) <br />thick, consisting of a slip -resistant polyethylene- or polypropylene -film top surface <br />laminated to a layer of butyl- adhesive, with release -paper backing; specifically <br />designed to withstand high metal temperatures beneath metal roofing. Provide primer <br />in accordance with underlayment manufacturer's written instructions. <br />Manufacturers: Subject to compliance with requirements, provide products by <br />one of the following: <br />a. GCP Applied Technologies Inc. <br />b. Henry Company. <br />