The American house-carpenter; a treatise upon architecture, cornices and mouldings, framing, doors, windows, and stairs. Together with the most important principles of practical geometry (1852)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York : J. Wiley · leaf 158
nd their horizontal thrusts at the tie-beam are also equal. (SeeArt. 250—Fig. 186.) When the inclination of a rooft (Fig.194,) is one-fourth of the span, or of ashed, (Fig. 193,) is one-halfthe span, the horizontal thrust of a rafter, whose centre of gravityis at the middle of its length, is… … Fig. 195. %8.—In shed, or lean-to roofs, as Fig. 193, the horizontalj».-.i*3sure will be entirely removed, if the bearings of the rafters, asA. B, (Fig. 195,) are made horizontal—provided, however, thatthe rafters and other framing do not bend between the points ofsupport. If a beam or rafter have…
Carpentry · Architecture
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