. Building and repairing railways . *ii• 30 = 2J- lf Fig. 226. SINGLE THROW SPLIT SWITCH No. 8; RIGID PROG 8 FEET LONG. I S»».r » ] S-NGLE THROW ^^^S^^^^^^i L S7f A U- ioolE ordinate in io rT-ore+Ji. 30 - - 2- f Pig. 227. SINGLE THROW SPLIT SWITCH No. •. RIGID PROG D PEET LONG. Fig, 228. ILE THRl i RIGID FROG IS PEET U 308 BUILDING AND REPAIRING RAILWAYS. Crossovers are necessary on double track rail-roads to enable west or north bound trains toreach sidings on south or east bound tracks andvice versa. Fig. 244 illustrates a crossover andits use. Fig. 245 is a plan of a crossover. Thelength of
. Building and repairing railways . *ii• 30 = 2J- lf Fig. 226. SINGLE THROW SPLIT SWITCH No. 8; RIGID PROG 8 FEET LONG. I S»».r » ] S-NGLE THROW ^^^S^^^^^^i L S7f A U- ioolE ordinate in io rT-ore+Ji. 30 - - 2- f Pig. 227. SINGLE THROW SPLIT SWITCH No. •. RIGID PROG D PEET LONG. Fig, 228. ILE THRl i RIGID FROG IS PEET U 308 BUILDING AND REPAIRING RAILWAYS. Crossovers are necessary on double track rail-roads to enable west or north bound trains toreach sidings on south or east bound tracks andvice versa. Fig. 244 illustrates a crossover andits use. Fig. 245 is a plan of a crossover. Thelength of the leads are given in Figs. 223 to230 and the distance D between the points of thefrogs in the main line track is given in Table 15,Appendix J. A rule often used by track men tocalculate the distance between the points of frogsat crossovers is as follows: From the distancebetween the gauge lines of parallel tracks, sub-tract the gauge of the track, multiply the re-mainder by the number of the frog, and theresult will be the distance between the points ofthe frogs. Care should be taken to place cross-overs so that trains will run through the switchesas shown in Fig. 244 and not against the point ofthe switch; this reduces the liability of accidentsfrom derailment. Dera
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
