. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . Fig. 156. — Class K Engine with 75 per cent Impact. (Freeman.) Computing the deflections of the rail, we find .049 inch for the 100-poundrail and .083 inch for the 80-pound rail on the 7-foot span under the drivers;on the 10-foot 11-inch span between the rear driver and the trailer a deflectionof .24 inch is shown by the 100-pound rail and .42 inch by the 80-pound rail. STEEL RAILS Plotting the curve of probable deflections for the 100-pound and 80-poundrail and
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . Fig. 156. — Class K Engine with 75 per cent Impact. (Freeman.) Computing the deflections of the rail, we find .049 inch for the 100-poundrail and .083 inch for the 80-pound rail on the 7-foot span under the drivers;on the 10-foot 11-inch span between the rear driver and the trailer a deflectionof .24 inch is shown by the 100-pound rail and .42 inch by the 80-pound rail. STEEL RAILS Plotting the curve of probable deflections for the 100-pound and 80-poundrail and using a general average depression under the drivers, proportional tothe uniform load under the drivers, we may find the tie depressions (Fig. 157).. Fig. 157. —Track Depression under Class K Loading. (Freeman.) The depression under a uniform load of 6500 pounds is taken at .20 this basis we get the following tie depressions and reactions: TABLE LIT —TIE DEPRESSIONS AND REACTIONS, CLASS K LOADING (FREEMAN) 100-pound Rail. 80-pound Rail. Tie. Depression. Bea Depression. Bearing. 1=75 Per cent. 1=100 Percent. 1=75 Per cent. 1 = 100 Per cent. A 3,0003,000 7,00010,00010,0007,0003,0003,1007,90014,00014,00011,00011,00014,00014,00011,00011,000 3,4003,4008,00011,40011,4008,0003,4003,5009,00016,00016,00012,60012,60016,00016,00012,60012,600 1,560 1,5605,70013,00013,0006,8001,1001,3009,10015,60015,60010,40010,40015,60015,60010,40010,400 1,780 B 1,780 C 6,500 D 14,850 E 14,850 F 7,800 G H 1,2601,500 I 10,400 J 17,800 K L M N 0 P Q 17,80011,90011,90017,80017,80011,90011,900 Taking moments unde
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