. Handbook of railroad construction; for the use of American engineers. Containing the necessary rules, tables, and formulæ for the location, construction, equipment, and management of railroads, as built in the United States .. . Fig. 69 D. Fig. 69 E. Fig. 69 Fig. t)9G. Fig. 69 n. 16S HANDBOOK OF RAILROAD CONSTRUCTION. the upper end of the arch brace to the chord. Fig. 69 K,the method of supporting the tracks at the end of the span,where the arch braces will not allow the floor beams tobear upon the lower chord. Fis. C\. McCalldms patent railroad bridge. 186. This bridge represents aclass
. Handbook of railroad construction; for the use of American engineers. Containing the necessary rules, tables, and formulæ for the location, construction, equipment, and management of railroads, as built in the United States .. . Fig. 69 D. Fig. 69 E. Fig. 69 Fig. t)9G. Fig. 69 n. 16S HANDBOOK OF RAILROAD CONSTRUCTION. the upper end of the arch brace to the chord. Fig. 69 K,the method of supporting the tracks at the end of the span,where the arch braces will not allow the floor beams tobear upon the lower chord. Fis. C\. McCalldms patent railroad bridge. 186. This bridge represents aclass of structures in which theupper chord is curved upwards(7i feet in 200 in the Susquehannabridge, New York and Erie Rail-road), which curved chord has theeffect of distributing an appliedload at once to all of the bracesdirectly.) by means of the chord, aswell as indirectly, by means of thebraces, as in the common this bridge is applied the archbraces A B, A B, fig. 70, whichserves to aid the 2d, 3d, and 4thpair of diagonal braces in bearingtheir load. The great distributing power ofthe curved chord, is shown by thefact that a bridge of 125 feet span,actually supported a railroad trainbefore the diagonal bracing wasintroduced. The whole strain w
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectrailroadsdesignandco
