The carpenter and joiner's assistant : being a comprehensive treatise on the selection, preparation, and strength of materials, and the mechanical principles of framing, with their application in carpentry, joinery, and hand-railing : also, a course of instruction in practical geometry, geometrical lines, drawing, projection, and perspective : and an illustrated glossary of terms used in architecture and building (1860)
Newlands, James, 1813-1871 · Glasgow : Blackie and Son · leaf 194
PRACTICAL CARPENTRY AND JOINERY. 13G ing is the same. The rafters are compressed, the strain¬ Let A B, c B (Fig. *458) be two rafters, placed on walls ing beam is compressed, and the tie-beam and posts, the at A and c, and meeting in a ridge B. Even by their own latter now called queen-posts, are… … place of, it does not fill the pffice of a tie-beam, but acts sink at B. If this tendency be restrained by a tie estab¬ merely as a bracket attached to the wall (Fig. 460). It is lished betwixt A and C, and if A B, B c be perfectly rigid, then called a hammer-beam. and the tie A c incapable of…
