The carpenter's new guide: being a complete book of lines for carpentry and joinery. Treating fully on practical geometry, soffits, brick and plaster groins ... with a great variety of designs for roofs, trussed girders ... with many other things entirely new: the whole founded on true geometrical principles; the theory and practice well explained and fully exemplified on eighty-four copper-plates; including some observations and calculations on the strength of timber (1830)
Nicholson, Peter, 1765-1844 · Philadelphia, J. Grigg · leaf 234
one may be at each extremity,one at the end of the quadrant, and one at the end of the straight piece, and the intermediatepoint at the intersection of a perpendicular drawn from the centre of the plan of the railpiece to a straight line joining the two extreme points. Let each of the upper… … STAIR-CASING. 99 the seats of the resting points; and let the three perpendicular lines themselves be calledthe heights of the rail piece, and their places distinguished by the lower height, the middleheight, and the upper height. For fig. 2, let a be the foot of the upper height, h the foot of the…
Carpentry
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