Economics of bridgework, a sequel to Bridge engineering (1921)
Waddell, J. A. L. (John Alexander Low), 1854-1938 · New York, J. Wiley · leaf 279
that thislimiting length is the reciprocal of the dead-load coefficient in Equation (4),and that a vertical line on the diagram of arch-rib weights per lineal foot ofspan, drawn through the abscissa point which represents this value of Z,will be asymptotic to the weight curve. Fifth. From the… … 9000O 70 00O 30 000 10 000> 1100 1300 1500 1700 1900 2100 2300 2600Span, in Feet. Fig. 26e. Weights of Metal in Double-Track, Steam-Railway, Long-Span Arch-Bridges of Carbon Steel for Class-60 Live-Load. limit is reached when it takes 4| lbs. of metal to carry 1 lb. of live load. Onthat basis,…
Bridges
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