Field-book for railroad engineers. Containing formulas for laying out curves, determining frog angles, levelling, calculating earth-work, etc., etc., together with tables of radii, ordinates deflections, long chords, magnetic variation, logarithms, logarithmic and natural sines, tangents, etc., etc (1877)
Henck, John Benjamin, 1816-1903 · New York : D. Appleton · leaf 116
ion ; HffiFiFis the road-bed, G Gi B^ B the CENTRE HEIGHTS ALOJSE GU^EN. 9*: surface of the ground, and G Gi H^ 11 and BB^F^F the planes form-ing the side slopes. This solid is a prismoid, and might be calculatedbv^the prismoidal formula (§ 113). The following metaod gives thesame result. A. Centre… … Fig. 51. }sol-iiion. Let c be the centre height at A (lig. 51) and Cj the heightaf, X.. The slope s is the ratio of the base of the slope to its perpen-dicular height (§ 102). We have then the distance out ^ B = ^6 +sc, and the distance out A^B^ ^ \h-\-sci{\ 102). Divide the wholemass into two…
Railroad engineering · Ferrovias
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