The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 373
he face-moulds. The moulds for the twistsof this stairs may be obtained as at Art. 473 ; but, as the falhng-mould in its course departs considerably from a straight line, itwould, according to that method, require a very thick plank forthe rail, and consequently cause a great waste of stuff. In… … Fig. 315. 0 Case 1.— When the middle height is above a line joiningthe other two. Having found at Fig. 314 the direction of thejoint, %o s^ and p e, according to Art. 4Y3, make k p e a, {Fig.315,) equal to k^ jy^ e p in Fig. 314 ; join b and c, and from o,draw 0 ^, at right angles to 6 c ; obtain…
Carpentry · Architecture
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