Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 259
242 MACHINE DESIGN AND MECHANICAL CONSTRUCTIONS. rig. 480 is side elevation, plan, and section of cast-iron girder, adopted byhim for railway purposes, a pair of girders for each track, the rails being sup-ported on wooden cross-beams. DIMENSIONS FOR DIFFEEENT SPANS. Opening. Bearing onabutment.… … Fig. 481. Eolled I-beams (Fig. 481) may be taken as the type in wrought-iron andsteel sections. The depths of the beams, A, and the widths, B, of bottom and top flanges do not vary much with the different makers for the saDie class of beams, but the thickness of the stems varies more.The tables of…
Mechanical drawing
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