Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 516
onal bracing, if the uniform load be con-sidered as acting from the centre toward each abutment, each tie or bracesustains the whole weight between it and the centre, and the strain is thisweight multiplied by the length of tie or brace, divided by its height. Anvdiagonals, equally distant from the… … Fig. 1194. Fig. 1195. should be stronger at the centre than at the ends, while diagonals should belargest at the abutments. Unless the weight of the bridge is great comparedwith the moving loads, counter-braces become necessary. The general rule adopted in the construction of the Howe truss is, to…
Mechanical drawing
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