International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 267
i 4.4ft. level, and the areas are calculated from the center cuts andfills. Let Fig. 377 represent the actual cross-section at agiven station, and Fig. 378 the cross-section based upon thecenter cut. The area of the section A B C D in Fig. 377,calculated from the actual cross-sections, is 160.78… … from a level section, with the same center cut, viz., G.4 feet,is 156.IG sq. ft., giving a discrepancy of 4.62 sq. ft. ; that is,the area of the section, calculated by level cuttings, is 4.62sq. ft. less than the area calculated from the actual cross-sections. This deficiency is about 3 per cent.,…
Railroad engineering
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