A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 266
d in Fig. 78. 163. Another combination arch, which is consideredvery strong and durable, is represented in Fig. 80; at rt- isshown the strongly braced skewback, having three or morewebs; at b, the inside blocks, laid end to end; at r, the side-method key; and at d, the beam protection, formed in… … Fig. 80. 164. Weiglit.—The weight, of course, varies with thedepth and span of the arch. The depth ranges from 6 to 12inches in arches constructed on the side method, and fromG to 15 inches in those built on the end method. For ofhceand store buildings, a common depth is 10 inches, the floor-beams…
Architecture · Building
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