. Electric railway journal . .■■Sinale Track. FI©. 10 Fie. U COMPARISON OF WEAR ON DOUBLE AND SINGLE-TRACK RAILS Fig. 6—Wears due to car traffic, rail design, wheel wear, andvehicular traffic. Fig. 1—Slethod of indicating total railhead areas availablefor wear. Fig. 8—Wear on groove girder rail. Fig. 9—Wear on tram girder raiL F16. 12 Fig-. 10—Head of rail worn by street traffic alone. Fig. 11—Comparison of wear on double and single-track highrail, total number of cars, 430,000. Fig. 12—Comparison of wear on single and double-track lowrail, total number of cars, 430,000. about
. Electric railway journal . .■■Sinale Track. FI©. 10 Fie. U COMPARISON OF WEAR ON DOUBLE AND SINGLE-TRACK RAILS Fig. 6—Wears due to car traffic, rail design, wheel wear, andvehicular traffic. Fig. 1—Slethod of indicating total railhead areas availablefor wear. Fig. 8—Wear on groove girder rail. Fig. 9—Wear on tram girder raiL F16. 12 Fig-. 10—Head of rail worn by street traffic alone. Fig. 11—Comparison of wear on double and single-track highrail, total number of cars, 430,000. Fig. 12—Comparison of wear on single and double-track lowrail, total number of cars, 430,000. about per 100,000 cars on a 100-ft. radiuscurve. (See diagram, Fig. 3.) In street work, especially for tangent tracks, we havevery little published data available. W. F. Graves, indiscussing Mr. Haas article, said in the Electric Rail-way Journal for Oct. 23, 1915, that measurements hehad observed indicated that a tonnage of 1,760,000 hadbeen moved for each t;V in. vertical wear. The par-ticular section and chemical composition were no
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