International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 543
TRACK WORK. Substituting the above given quantities in the proportion, we have ^ 11.32 : 4.71:: 100^ ://; whence, j7=«»:x4.7i_ ,„d 11.32frog distance p f = G4.5 feet. If the space between the gauge lines of the rails at the heels of a split switchbe taken at 5 inches =0.42 of a foot, the dis-tance… … Fig. 540 q h and substituting known values, we have11.32 : 0.42::100 : ^/; whence. qh = 10,000 X 0.42 = 371.02, and 11.32qh = 19.2G feet. This locates the heel of a split switch and the toe of a stJibsivitcJi. T\\Q frog angle is the angle /// (see Fig. 540) formed bythe gauge line of the main rail…
Railroad engineering
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