International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 282
the back of thestake F. 11.5. If the section istaken at an intermediate point,i. e., a sub-station, say 20+ 50,the center line is located by rang-ing in from the stakes at theregular stations and the stakeis marked 20 + 50 on one sideand the fill, F.11.5, on the otherside, and the stake driven… … —&5 *\^^.5- -FilllSa 8? 2 RAILROAD CONSTRUCTION. the rod reading at the right of the center line is 9.5 feet,which, added to 5.5 feet, the difference between the heightof instrument andgrade, gives a fill of15 feet. The naturalslope of earth is oneand one-half horizon-tal to one vertical,called…
Railroad engineering
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