The theory and practice of modern framed structures : designed for the use of schools, and for engineers in professional practice (1897)
Johnson, J. B. (John Butler), 1850-1902, Bryan, C. W. (Charles Walter), 1863-1927, Turneaure, Frederick Eugene, 1886- · New York : J. Wiley & Sons · leaf 224
wheel load method to cantilever bridges with double sys-tems, and hence the following discussion will treat mainly of uniform loads, with or withoutexcess loads. In finding the proper positions of live load for maximum stresses in the various members,it will be useful to draw the influence lines… … Fig. 238. ^4 xl -J, and hence a negative moment at G equal to which is laid off as Ee in Fig. {a). As the load moves to D or F, the moment at G decreases uniformly to zero and the influence line forthis portion is FeD. As the load moves from D to G, the moment increases from zero to a — •*■) value…
