Economics of bridgework, a sequel to Bridge engineering (1921)
Waddell, J. A. L. (John Alexander Low), 1854-1938 · New York, J. Wiley · leaf 286
tender-ing on work. The reason for thisuncertainty is that the varying physi-cal conditions at different crossingsaffect the arch layouts to such anextent as materially to influence theweight of metal required. As theformulae were based on economicfunctions, the weights given by theiruse might very… … ECONOMICS OF STEEL ARCH-BRIDGES 249
Bridges
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