International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 697
ts of 6 in. x 10 in.floor-beams/(., /, etc., laid 2 ft. center to center, as shownin the figure, and drift-bolted to the supports. Uponthese floor-beams is laid a flooring of 3-in. oak planks,which are covered with plates of sheet iron from ^ toy^g in. in thickness to protect them from the wear of… … RAILROAD STRUCTURES. 1283 of different sizes, so as to meet the requirements of the dif-ferent types of engines. The partition walls are also pro-tected with sheet iron. The track stringers are placeddirectly over the middle posts. They consist of two pieces8 in. X IG in., and extend over two…
Railroad engineering
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