Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 181
by 1*26, the cube-root of 2, gives 5-55, which, multiplied by 0.72, gives nearly 4inches—the depth required. 298.—If, instead of framing the principal rafters and straining-beam into the king and the queen posts, they be permitted to abutagainst each other, and the king and the queen posts be made… … FRAMING. 167 290.—Fig, 213 shows a method of constructing a trass having^ built-rib in the place of principal rafters. The proper formfor the curve is that of a parabola, {Art. 127.) This curve, whenas flat as is described in the figure, approximates so near to that ofthe circle, that the latter…
Carpentry · Architecture
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