. Railway track and track work . race tie-plateon every tie. and two between the ties, the latter having anchor bolts embeddedin the concrete, so as to hold them rigidly upon the concrete. A 7-in. rail is used. When the cross-tie system is employed, the rails rest onwhite-oak ties 24 ins. apart, with a brace tie-plate on every third tie. Underthe ties is a 6-in. bed of gravel concrete, which is also filled in between and overthem. The use of ordinary concrete under the ties necessitates the stoppingof traffic (as the track cannot be held to line on wet concrete), and where it is
. Railway track and track work . race tie-plateon every tie. and two between the ties, the latter having anchor bolts embeddedin the concrete, so as to hold them rigidly upon the concrete. A 7-in. rail is used. When the cross-tie system is employed, the rails rest onwhite-oak ties 24 ins. apart, with a brace tie-plate on every third tie. Underthe ties is a 6-in. bed of gravel concrete, which is also filled in between and overthem. The use of ordinary concrete under the ties necessitates the stoppingof traffic (as the track cannot be held to line on wet concrete), and where it isnot practicable to divert traffic a dry concrete is used. The gravel and sand 278 TRACK. are excavated with a i-yd. orange-peel bucket; two sacks of cement are thrownupon it. and the load is then dropped into a concrete mixer, which delivers itdirectly to the ballast cars. This concrete has the ordinary moisture of thepit gravel. It is laid in the same way as gravel ballast, and the track properly ■ze ■ Dry Groirf- WoodFill:.
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Keywords: ., bookcentury1900, bookdecade1900, books, booksubjectrailroadtracks
