. Building and repairing railways . Fig. 333. TO TAKE THE ANGLE OF A FROG. Measure A-B and C-D and add them together, then divide the distanceB-C by their sum. Example: Distance A-B=8, C-D=4, then 8 + 4=12. The distanceB-C=72, 72-M2=6 or No. 6 Frog. Caution. In measuring be careful that all measurements are made onthe running line. MAINTENANCE OF WAV. 381 Appendix J, give the angles of frogs of differentnumbers. Headblocks or headchairs are made ofeither Cist or wrought iron. Fig. 834 illustrates. Fig. 334. HEAD BLOCKS OR HEAD CHAIRS FOR STUB I and 2 for riirht hand main line rai
. Building and repairing railways . Fig. 333. TO TAKE THE ANGLE OF A FROG. Measure A-B and C-D and add them together, then divide the distanceB-C by their sum. Example: Distance A-B=8, C-D=4, then 8 + 4=12. The distanceB-C=72, 72-M2=6 or No. 6 Frog. Caution. In measuring be careful that all measurements are made onthe running line. MAINTENANCE OF WAV. 381 Appendix J, give the angles of frogs of differentnumbers. Headblocks or headchairs are made ofeither Cist or wrought iron. Fig. 834 illustrates. Fig. 334. HEAD BLOCKS OR HEAD CHAIRS FOR STUB I and 2 for riirht hand main line 4 and 5 for left hand main line 2 and 4 for single throw 4 and 5 for three throw 6 and 7 cast iron rail braces.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
