A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 42
Y. 31 62. In some cases, iron or steel rails are used for foot-ings, and are cheaper than I beams. The footings are builtup with from three to six layers of rails placed at rightangles to each other. As each layer of rails is laid, concreteis filled between and around them, and when… … Fig. 19. bond stone in the pier, and d is the concrete base. In thiscase, each layer of rails diminishes in length and number,until the area of the top layer does not greatly exceed the sizeof the pier base, the footing thus assuming a pyramidalform. 63. An example of the use of I beams is shown…
Architecture · Building
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