International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 652
girts to plumb posts.I in. X lU in. ; longitudinal girts to batter posts.J in. X 18 in. ; packing-bolts for posts.I in. X 20 in. ; interior diagonal braces to posts. RAILROAD STRUCTURES. 1237 W^ashers :Separators : j f in. X 3 in. 1 in. X 3^ in. 2 in. X 3^ in. STANDARn FRAMRD TRESTLE, OHIO… … 8h2 ^ ■( ^ 4i. Fig. 625.above 30 feet two decks are employed, as shown in thefigure. As the middle posts are directly under the rails,they carry a large share of the load, and to distribute thisload the counter posts a b and c dare employed. The innerDosts are given a batter of ^ inch to the foot,…
Railroad engineering
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