. Railroad structures and estimates . PUBLIC ROAD CROSSINGS. with flatted cedar sill under and 12 X 12 cap on top; the bentsare crossed braced from sill to cap with S X 10 plank, one oneach side, and 3 X 10 braces are also inserted longitudinally,at least one panel on each side of the track. Where desiredconcrete foundation is built under the bents. Highway or overhead farm crossing. Fig. 104, has a ponytruss across the track; where long timbers are scarce this is thecheaper scheme. The cost of the crossing shown with concrete foundationsunder the bents 5 ft. below the ground Une would be abou
. Railroad structures and estimates . PUBLIC ROAD CROSSINGS. with flatted cedar sill under and 12 X 12 cap on top; the bentsare crossed braced from sill to cap with S X 10 plank, one oneach side, and 3 X 10 braces are also inserted longitudinally,at least one panel on each side of the track. Where desiredconcrete foundation is built under the bents. Highway or overhead farm crossing. Fig. 104, has a ponytruss across the track; where long timbers are scarce this is thecheaper scheme. The cost of the crossing shown with concrete foundationsunder the bents 5 ft. below the ground Une would be about$2000. Public Road Crossings. — At public road crossings the widthvaries from 16 ft. to 20 ft. and over. Where possible the cross-ing should be placed between rail joints. Old rails are used tomake the flange wsiy which must not be too wide, for horseshoofs catching in the gutter. Fig. 105 illustrates the C. P. R. wood plank crossing and theestimated cost of same 16 ft. wide by 8 ft. is $15. Cut ends of rail toBuit bevel of plank. STANDARDROAD CROSSING I I iihims of eld tisb plates cut eo as to^^ make bolt boles suit for spiking. Fig. 105. C. P. R. Wood Plank Crossing. Permanent Paved Crossing. — A design for a pavement rail-way crossing, Fig. 106, as illustrated in the Eng. News, , 1916, was devised by G. V. McClure, City Engineer, Okla-homa, Okla. By making a run off on each side of the concrete foundationa cushion of ballast is obtained excepting at the crossing properwhich is built solid. The concrete is 2 ft. deep and 8 ft. wide .>,,;;;.V,\. ■...•■.iiOO-^
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Keywords: ., bookauthororrockjohnwilson1870, bookcentury1900, bookdecade1910
