. Details of railroad girder bridges . cep-tional cases plates have taMen their place. The IllinoisCentral Railway used plates for laterals on some of theirsub-way girders. For the end cross-frames of heavy gir-ders, the Morthern Pacific Railway designs require seven-inch channels. The angles used in the laterals are oftenfastened by both legs, in order to develop the full strengthof the member. The practice of using 3-l/2 x 3-l/2 x3/8 angles for intermediate cross-frames spaced every twoor three panels, is quite common for all spans. The advantages of plates for tension members oflateral brac
. Details of railroad girder bridges . cep-tional cases plates have taMen their place. The IllinoisCentral Railway used plates for laterals on some of theirsub-way girders. For the end cross-frames of heavy gir-ders, the Morthern Pacific Railway designs require seven-inch channels. The angles used in the laterals are oftenfastened by both legs, in order to develop the full strengthof the member. The practice of using 3-l/2 x 3-l/2 x3/8 angles for intermediate cross-frames spaced every twoor three panels, is quite common for all spans. The advantages of plates for tension members oflateral bracing are becoming recognized. There is no wasteof metal and in addition to being economical, they are easyto handle. The only disadvantage is a tendency to sag; buton through bridges sagging can be prevented by attaching theplates to the stringers. V. FLOOR SYSTiMS. 1. Decfe bridges. On deck girders the ties are notched over theflanges to form the floor system. Every fourth tie is fast- 21 T YPE3 OF3TA hOA RD FL OOR3DECK G/ROER BR/PGE3.
Size: 2152px × 1161px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1906
