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<br />12000lb <br />or <br />16000lb <br /> <br />! <br /> <br />f 0.83 ft. (lOin.) <br /> <br /> <br />D <br /> <br /> <br />~7 It. (20 in.) , <br /> <br />t <br /> <br /> <br />Source: <br /> <br />Concrete Pipe Handbook <br />American Concrete Pipe Association <br /> <br />Exhibit 19. Surface contact area for single dual wheel. <br /> <br /> <br />~8J <br />it.(l <br />O'iJ <br />I.... <br />;7 <br /> <br />Wheel Load Area <br /> <br />H 0 istributed Load Area <br /> <br />Source: Concrete Pipe Handbook <br />American Concrete Pipe Association <br /> <br />Exhibit 20. Distribution of live load (single dual wheel) <br />for depth of cover H. <br /> <br />31 <br />