International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 466
between the ties, flush with their tops, and extendsto a depth of 8 inches below them, sloping from the outertop edge A of the tie to the edge of the ditch. On some roads the shoulders at B and C are rounded off,as shown by the line D £, before the ballast is deposited.The effect of this is to… … toms of cuts and the tops of embankments. The actualS^radc line marks the elevation of the top of the rail, and isfrom 15 to 24 inches above subgrade. When gravel orbroken stone is used as ballast, the material excavated inditching the cuts should be loaded on a gravel train and de-posited upon the…
Railroad engineering
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