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... ...~ ~. .. .. ~. ~i%.Y ii._£:vm.-~~. _. -..~.~ _.. 'GCS: ^... -_ - _~_ .. - ....~+r.~ i <br />r~. <br />Handbook of <br />Steel Drainage & <br />Highway Construction <br />Products SECOND EDITION <br />Prepared under direction of <br />the HIGHWAY TASK FORCE for <br />Committee of Galvanized Sheet Producers <br />Committee of Hot Rolled and Coid Rolled <br />Sheet and Strip Producers <br />.~ <br />Published by <br />AMERICAN IRON AND STEEL INSTITUTE <br />1000 16th Street, N.W., Washington, D.C., 20036 <br />]97l <br />i <br />_ _S <br />~•YC~ j_ <br />.- C. <br />