. Elements of railroad track and construction . 142 RAILROAD TRACK AND CONSTRUCTION. TABLE XVI. Crossover Frog Distances. Center to Center of Tracks. Frog. No. Frog-distance along MainRail. Distance between TheoreticalPoints of Frog. 12 0 12 2 13 0 12 0 12 2 13 0 56 7 8 9 10 • 139. Reinforced Switch-point Rails. — Switch-point rails are made plain or reinforced. The plain. SECTION A-A Fig. 83. Fig. 84. switc
. Elements of railroad track and construction . 142 RAILROAD TRACK AND CONSTRUCTION. TABLE XVI. Crossover Frog Distances. Center to Center of Tracks. Frog. No. Frog-distance along MainRail. Distance between TheoreticalPoints of Frog. 12 0 12 2 13 0 12 0 12 2 13 0 56 7 8 9 10 • 139. Reinforced Switch-point Rails. — Switch-point rails are made plain or reinforced. The plain. SECTION A-A Fig. 83. Fig. 84. switch-point rails are formed by planing both sidesof the head and one side of the flange of the rail sothat the face of the rail that forms the gauge of thetm-nout will be in proper position when the switch railis held against the main rail by the switch rods. InFigs. 81 and 82 are shown the plan and elevation ofabout three and one-half feet of a pair of switch-pointrails and their attachments. In Figs. 83 and 84 are I PRACTICAL TURNOUTS. 143 shown sections of the main rails and the switch-pointrails at the points A and A, Fig. 81. If the rein-forcing bars a a and reinforcing angles hhh wereomitted from Figs. 83 and 84 the plain switch-pointrails would be left. Short switch-point rails are notusually reinforced, but long points always are. Thereinforcing consists of the bars a a and the anglesbbh riveted to the point-rails. 140. Switch Rods.—Switch-point rails are con-nected and held in position by one or more rods a aand h h, Fig. 81, the end rod bein
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