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 267
inconsiderable, but gradually increases towardsthe crown. The following table gives the portion of theweight of the arch-stones that presses upon the framing atthe various angles of inclination formed by the bed of the 230 CONSTRUCTION. Stone with the horizon. The pressure perpendicular to thecurve… … Fig. 108. From this it is seen that at the inclination of 44 degrees the(pressure equals one quarter the weight of the stone ; at 57degrees, half the weight; and when a vertical line, as ad{Fig. 108), passing through the centre ofgravity of the arch-stone, does not fallwithin its bed, c d, the…
Carpentry · Architecture · Building
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