A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 228
1 II A Fig. 57. If this method is too costly, the lintel may be cut in 3pieces, as shown at c^ d, and i\ and supported by a heavyangle bar, as described under Lintels. 103. Rubble Arelies.—For rough purposes, arches aresometimes built of rubble, as shown in Fig. 58, in which brepresents the wall… … Fig. !58. to a wedge shape. Such arches should always be laid incement mortar, as they depend considerably upon the adhe-sive power of the mortar for their stability. 58 MASONRY. § 8 CONSTRUCTION OF AKCITES. 104. Toiissoirs.—The ring of the arch should be builtof the very best kind of ashlar…
Architecture · Building
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