Economics of bridgework, a sequel to Bridge engineering (1921)
Waddell, J. A. L. (John Alexander Low), 1854-1938 · New York, J. Wiley · leaf 274
rom 7.8% of the span-length for100-ft. spans to 5.3% thereof for 1000-ft. spans; and for highway bridgesthe corresponding variation is from 5.8% to 4.2%, as shown in Fig. 26a. The effects on rib weights from using uneconomic rib-depths in braced-rib arches for both railway and highway bridges are… … 0.03 . 0 ,100 200 300 400 500 600 700 800 900 3^00Span- length, in Feet, Fig. 26a. Economic Ratios of Depth of Arch-Rib to Span Length.GS Q6 df 0.8 .. 0.9 ._; 1.0 U f.2 15 1.4 . S
Bridges
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