Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 359
how much the stifiness of a thin plank is increased by simplynailing down the ends; but in trusses of considerable length, it isdifficult to take advantage of this source of economy. Sometimesit may be possible to anchor the ends of a wooden truss, as in thecase of a deck bridge of a single span… … which is given in Figs. 29 and 30. This bridge, built to carry adouble track railway, has a span of 98-43 feet in the clear, and iscomposed of three plate girders, the two outer ones being each 4-59deep, and the intermediate one 6*56 feet. Fig. 29 is a general view of the bridge, while thedetails…
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