Economics of bridgework, a sequel to Bridge engineering (1921)
Waddell, J. A. L. (John Alexander Low), 1854-1938 · New York, J. Wiley · leaf 193
e of400 pounds per square foot of lateral sinfacc in contact with solid material.The not weight of the water-soaked timber in the caisson is taken as zero ECONOMIC SPAN-LENGTHS FOR SIMPLE-TRUSS BRIDGES 155 and that of the concrete at eighty pounds per cubic foot. The partially-filledcaissons when… … o ^oo 200 200 Aoo SCO aoa^EL rroiSeR SOQcw^ioaf. no)qobi.Sp<3n \n Feef- FiG. 18c. Total Weights of Metal in Superstructures. times (in extreme cases) 500 pounds per square foot. Of course, it is prac-ticable to load temporarily the caisson as it reaches the neighborhood of itsfinal position; but…
Bridges
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