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5thWall Building Diagnostics Consultants Government Services Annex <br /> District Attorney Office <br /> Roof Replacement <br /> November 2009 <br /> 1 . Eave and Rake and Trim <br /> 2 . Step Flashing <br /> 3 . Counterflashing <br /> D . Stainless Steel Metal : Shall be type 316 stainless steel , 24GA cold rolled, annealed , with <br /> a 2B finish, and conforming to the requirements of ASTM A480 and Federal <br /> Specification QQ - S - 766C . <br /> 2 . 02 Accessory Materials <br /> A . Lead : 3 - lb per square foot conforming to the requirements of ASTM 1329 - 55 . Color <br /> shall be natural gray . <br /> B . Continuous cleats for prefinished metal : Shall be 22 gauge galvanized steel sheet metal <br /> conforming to ASTM A446 , G 90 . <br /> C . Clamps : Shall be stainless steel, Type 316 <br /> D . Fasteners : Shall be type and size as required by construction . Shall meet ASTM A153 , <br /> connectors shall meet ASTM A653 Class G 185 <br /> 1 For concealed fastening into wood, use stainless steel , ring- shank nails 1 3 /4 <br /> inches by 11 gauge . <br /> 2 For exposed fastening into wood, use stainless steel screws with integral <br /> neoprene washers . <br /> 3 For fastening into concrete , use masonry/concrete anchors with neoprene <br /> washers . Use all metal stainless steel anchors only, no plastic or nylon anchors <br /> allowed . <br /> E . Pop Rivets : Shall be 1 /8 inch to 3 / 16 inch diameter with stainless steel mandrels and <br /> washers ; color- clad to match pre -finished metal . Use copper rivets with copper metal . <br /> F . Masonry Fasteners . Shall be 1 /4 inch x 1 inch mushroom head, one -piece nail drive <br /> anchor ; zinc alloy body with stainless steel drive nail . <br /> G . Caulking : Shall be as specified in Section 079200 , Sealants and Caulking . <br /> H . Screws : Shall be 300 series stainless steel self- drilling, self-tapping, No . 10 pan head <br /> minimum 1 1 /4 inches long, with neoprene washers . <br /> I . Solder : Shall be 50/50 tin- lead alloy, conforming to ASTM B32 . <br /> J . Flux : Shall be non- acid, non- corrosive, specifically designed for use with 50/50 solder . <br /> K . Self-Adhering Membrane : Shall be composed of a rubberized asphalt laminated to a <br /> polyethylene film conforming to the requirements of ASTM D4970 . Total thickness of <br /> the membrane shall be 40 mils minimum . Materials shall be similar to Ice and Water <br /> Shield by W . R . Grace ; Polyguard Deck Guard by Polyguard Products ; Royston Ice Guard <br /> 108AGN, or approved equal . <br /> L . Strainers : Shall be wire basket type formed of No . 14 B & S gauge copper wire, or cast <br /> bronze, and shall fit snugly in outlet tubes . <br /> 09 -26 Sheet Metal Flashing and Trim <br /> 076200 - 3 <br />