A treatise on architecture and building construction . FIG. 64. THE USE OF THE STEEL SQUARE. 153. One of the most useful tools in the carpenters kitis the steel square, as with it may be solved a number ofproblems which would otherwise require extensive drawings,or tedious calculations. Fig. G5 shows the regular form ofthis instrument; the length of the blade ac \& always 24inches, and that of the tongue a b varies, in different squares. 86 CARPENTRY. 9 from 12 inches to 18 inches. The corner a where the bladeand tongue meet, is called the heel. 153. In marking- the plumb-cut or foot-cut on a
A treatise on architecture and building construction . FIG. 64. THE USE OF THE STEEL SQUARE. 153. One of the most useful tools in the carpenters kitis the steel square, as with it may be solved a number ofproblems which would otherwise require extensive drawings,or tedious calculations. Fig. G5 shows the regular form ofthis instrument; the length of the blade ac \& always 24inches, and that of the tongue a b varies, in different squares. 86 CARPENTRY. 9 from 12 inches to 18 inches. The corner a where the bladeand tongue meet, is called the heel. 153. In marking- the plumb-cut or foot-cut on a rafter,where the pitch of the roof is known in the proportion of jjjMMLkLi. ?(? i|jo|7e|i ell 4 o|i 4 t|i €|i 4 ill I •le| ^1 I «l *l ^t^-^^ I ^-, ,tj,i1,
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Keywords: ., bo, bookcentury1800, booksubjectarchitecture, booksubjectbuilding
