The American house carpenter. A treatise on the art of building. Comprising styles of architecture, strength of materials, and the theory and practice of the construction of floors, framed girders, roof trusses, rolled-iron beams, tubular-iron girders, cast-iron girders, stairs, doors, windows, mouldings, and cornices; together with a compend of mathematics. A manual for the practical use of architects, carpenters, stair-builders, and others (1880)
Hatfield, R. G. (Robert Griffith), 1815-1879, Hatfield, O. P., ed · New York, J. Wiley & sons · leaf 258
me.—To find theshape, let A [Fig. 99) be the plan, and B the section, of a givendome. From a draw ^ ^ at right angles \.o ab \ find thestretch-out {Art. 524) of ob, and make dc equal to it; dividethe arc 0 b and the line d c each into a like number of equalparts, as 5 (a large number will insure… … to ^ ^; join s and a, and from the points of division in the arcob drop perpendiculars, meeting asintjk/; from thesepoints draw ^ 4,7*3, etc., parallel to <^^; make do,e i, etc., onthe lower side of ac, equal to do, e i, etc., on the upper side ;trace a curve through the points 0, 1,2, 3, 4, c,…
Carpentry · Architecture · Building
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