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<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 Cold Rolled <br />Sheet and Strip Producers <br />Published by <br />AMERICAN IRON AND STEEL INSTITUTE <br />1000 16th Street, N,W., Washington, D.C., 20036 <br />1971 <br />_ ':: <br />. ~.; <br />Y <br /> <br />