Identifier: steelrailstheirh01sell Title: Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design Year: 1913 (1910s) Authors: Sellew, William Hamilton, 1875- Subjects: Railroad rails Publisher: New York, D. Van Nostrand Contributing Library: The Library of Congress Digitizing Sponsor: The Library of Congress

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Text Appearing Before Image: 1 P. R. R.10 7223 ■t BO.WI. f ^ ■%*i300 -.Jl Ji-*-. 1 ■■ i PE,iN-NlSYLV,A -^ • ■ 1 in I^Ll. - ^ ^ ^^~^ r» , f^ ■.■■-• nmmmm 1-^ -. ^: HhW^ i r -^ ■ ^^BIS^B m^^aiKtim^ mi Fig. 39. — Gondola Car. Wooden Body. Pressed Steel Underframe. Capacity 100,000 lbs. Weight 44,500 lbs. The proposed use of 80-ton freight cars with four-wheel trucks forspecial service f suggests some comparison of these loads with those imposedby the engine drivers. The proposed 80-ton car will weigh about 50,000pounds and the total weight of the loaded car will be 210,000 pounds, which,when carried by eight wheels, produces a static load on the rail of 26,250 pounds. Weights on drivers have always greatly exceeded the load on smaller carwheels, and the reason for this seems to have been the greater strength ofthe larger wheels. Owing to the work locomotive tires receive in rolling they * Railway Age Gazette, January 28, 1910. t Hiid-, December 22, 1911. PRESSURE OE THE WHEEL ON THE lUIL 83

Text Appearing After Image: Fig. 40. — Coke Car, All Steel. Capacity 100,000 lbs. Weight 47,600 lbs.

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