Economics of bridgework, a sequel to Bridge engineering (1921)
Waddell, J. A. L. (John Alexander Low), 1854-1938 · New York, J. Wiley · leaf 134
openingsto 0.4 for 2,000-foot openings,while the author two decades agoshowed the economic ratio to be0.375; and, as previously men-tioned, he (Dr. Steimnan) makesthe length of the anchor arm 0.4of the main opening instead ofabout one-half of that amount. Second. Dr. S t e i n m a n sbridges carry… … Third.by tin; bac ECONOMICS OF CANTILEVER AND SUSPENSION BRIDGES 99 by steel-trestle approaches entirely disconnected from the mainstructure. Fovrth. Dr. Steinman uses a tension intensity of worlcing stress of20,000 pounds for carbon steel and one of 30,000 pounds for nickel steel,
Bridges
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