Economics of bridgework, a sequel to Bridge engineering (1921)
Waddell, J. A. L. (John Alexander Low), 1854-1938 · New York, J. Wiley · leaf 135
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, … /XW ISOO /.eoo 2000 2/£»0 2.200 230O 2400 2500 26^ ^TdtO Fig. 13/. Modified Cost Curves for Double Track Railway Bridges. while the authors practice has been to employ, respectively, 16,000 poundsand 28,000 pounds. Fijth. Dr. Steinman ignores entirely the effect of impact on trusses,while the…
Bridges
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