International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 677
8 n 0.95 75,264 4 42.3 478 464 1 9 6.4G 81,536 4i 47.8 508 480 1| 6.99 88,256 H 53.6 570 080 111 7.53 95,200 if 59.7 635 040 The load which each king-rod sustains we found to be,500 lb. A rod which would safely sustain this load 1262 RAILROAD STRUCTURES. with a factor of safety of (I would break… … RAILROAD STRUCTURES. 12G3 1;^ in. in diameter, which is the diameter we specify for king-rods. The stress in the rafters produces a shearing stress along the grain of the tie-beam at the footing of the rafter. This stress is equal to r /, or 7,800 lb. We find in Art. 1809 that the working stress…
Railroad engineering
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