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1. Form metal accurately and to the dimensions and shapes required, <br />finishing molded and broken surfaces with true, sharp and straight lines <br />and angles. <br />2. Unless otherwise specifically permitted by the Architect / Engineer, turn <br />exposed edges back 1/2". <br /> <br />B. Form, fabricate, and install so as to adequately provide for expansion and <br />contraction in the finished Work. <br /> <br />C. Weatherproofing: <br />1. Finish watertight and weather tight where so required. <br />2. Make lock seam work flat and true to line. <br />3. Make lap seams, when sealed, at least ½ " wide. <br />4. Where lap seams are not soldered or sealed, lap according to pitch, but in <br />no case less than 3". <br />5. Make flat and lap seams in the direction of flow. <br /> <br />D. Joints: <br />1. Provide suitable watertight expansion joints for runs of more than 40'-0", <br />except where closer spacing is indicated on the Drawings or required for <br />proper installation. <br />2. Join parts with rivets or sheet metal screws where necessary for strength <br />and stiffness. <br /> <br />3.3 EMBEDMENT <br /> <br />A. Embed metal in connection with roofs in a solid bed of sealant, using materials <br />and methods described in Section 07920 of these Specifications or other <br />materials and methods approved in advance by the Architect / Engineer. <br /> <br />3.4 TESTS <br /> <br />A. Upon request of the Architect / Engineer, demonstrate by hose or standing water <br />that the flashing and sheet metal are completely watertight. <br /> <br />END OF SECTION <br /> FLASHING AND SHEET METAL <br />07600-3 <br /> <br />