. Electric railway journal . 24 They were mortised at their ends, and expansion joints t:l in. wide filled with hot 1:4 asphalt mastic wereused as a seal. The mortise was used to prevent lateralshifting. Gravel was placed on each side of the slabsto assist in keeping them in line and to act as a protec-tion for the subgrade. The timber used for the tie blocks and stringers wascreosoted fir, while tie plates were used with the blocksbut not with the stringers. Screw spikes were used inall cases. The rails were 90-lb. —B section, , with standard 24-in. angle-bar join
. Electric railway journal . 24 They were mortised at their ends, and expansion joints t:l in. wide filled with hot 1:4 asphalt mastic wereused as a seal. The mortise was used to prevent lateralshifting. Gravel was placed on each side of the slabsto assist in keeping them in line and to act as a protec-tion for the subgrade. The timber used for the tie blocks and stringers wascreosoted fir, while tie plates were used with the blocksbut not with the stringers. Screw spikes were used inall cases. The rails were 90-lb. —B section, , with standard 24-in. angle-bar joints laid op-posite. It is stated in particular that there has beenvery little wear on the timber stringers, not exceedingJ in. in depth, and thought to be due to compression ofsurface fiber. The rails crept some on the stringers, butthis was stopped by cutting them at intervals and apply-ing rail anchors which bear against the ends of the Block 6x6xB4?. Screw Spite . ,„ ,„ „ DritrBolts■ A .^•/•^;:::..#.r ?4k. Block3xdx20- 8-6 ?h ■H Iron Shim SVi •HeyB/oc/c - \6sm
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
