International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 297
the province of the engineerto attempt to meet phenomenal conditions, but he shouldmeet common extremes, and there is no branch in railroad 886 RAILROAD CONSTRUCTION. construction where he so often blunders as in the matter ofculverts. 1468. Parts of an Arch.—Fig. 387 represents anarched culvert in… … Fig. 387. DFE and G B H \?> called the face. Lines level with Dand E and at right angles to the face of the arch are calledspringing lines or springs. The blocks of which thearch is composed are called arch stones or voussoirs.The center one B F is the keystone, and the lowest onesA and C the…
Railroad engineering
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