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 283
endicular toA B, draw K N\ then K N will be the proper riser for apitch-board of which ^ A^is the tread. So, likewise, L Mwill be the appropriate riser for the tread A M. The arc F Gis introduced to limit the rake-line of pitch-boards occur-ring between F and C, in order to avoid making them… … To compute the length of risers an,d treads, we have forthe scale for shops, for those occurring between i^and B— r:= 1(28-0: (io8.) / = 28 — 2 r ; (109.) and for those between F and G, we have— (108, A.)(109, A.) r= 1/156.8 - /^ ^= |/i56.8-r^ For the scale for dweUings, we have, for those…
Carpentry · Architecture · Building
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