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 231
s is the pressure upon a vertical surface ; roofs, however,generally present to the wind an inclined surface. The ef-fect of a horizontal force on an inclined surface is in pro-yjortion to the sine of the angle of inclination ; the directionof this effect being at right angles to the inclined… … on which the roof rests, and the latter acting directly on thematerials of which the roof is constructed—this latter forcebeing in proportion to the sine of the angle of inclinationmultiplied by the cosine. This will be made clear by the following explanation. Re-ferring to Fig. 83, let D KEbe the…
Carpentry · Architecture · Building
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