Manual for railroad engineers and engineering students : containing the rules and tables needed for the location, construction, and equipment of railroads as built in the United States (1883)
Vose, George L. (George Leonard), 1831-1910 · Boston : Lee and Shepard · leaf 300
ounds per foot, to I beams 15 deep, weigh-ing 66% pounds per foot, connected by a stiff lattice, thus formingan open post rectangular in section, varying from 10 to 24 wide.These posts reach 6 below the main coupling pin passingthrough their foot, the pin seat in the post being re-enforced by acast… … The floor of a railway bridge may be supported directly uponthe chords, by cross beams reaching from side to side of thebridge, when the chords are of such size and material as not tobe damaged by the transverse strain thus produced. A prefer-able method, however, is that shown in Fig. 113, and…
Railroad engineering
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