. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . mm o 3700 lbs. PER UN. FOOT 3000 lbs. Fig. 154. — Class I Engine with 75 per cent Impact. (Freeman.). o oo Fig. 155. — Track Depression under Class I Loading. (Freeman.) Plotting the most probable deflection of the 100-pound rail (shown in solidline) and the 80-pound rail (shown in broken line), and then taking the tie re-actions as proportional to the ordinates to the curves of deflection, we mayexpect the following depressions and reactions: TABLE LI. —TIE DEPR


. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . mm o 3700 lbs. PER UN. FOOT 3000 lbs. Fig. 154. — Class I Engine with 75 per cent Impact. (Freeman.). o oo Fig. 155. — Track Depression under Class I Loading. (Freeman.) Plotting the most probable deflection of the 100-pound rail (shown in solidline) and the 80-pound rail (shown in broken line), and then taking the tie re-actions as proportional to the ordinates to the curves of deflection, we mayexpect the following depressions and reactions: TABLE LI. —TIE DEPRESSIONS AND REACTIONS, CLASS () I LOADING Tie. 100-pound Rail. SO-pound Rail. Depression. Bearing. Depression. Bearing. A Inch. 100 170 IS0 IS0 ,300 8,10010,2008,1005,3005,3009,100 11,800 9,700 9,700 11,800 11,800 04 0 IS0 230 180 040 040 170 20 240 170 170 240 24 ,200 10,000 12,000 10,000 2,200 2,200 9,500 13,400 13,400 0„iOO 9,500 13,400 13,400 B c D E F G H I J K L M STRESSES IN THE RAIL 215 If we use these tie reactions and assume with Winckler that the momentsin a continuous girder over yielding supports are three-fourths those of asimple bea


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