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
their horizontal thrusts at the tie-beam are also equal. (SeeArt. 250—Fig. 186.) When the inclination of a roof, [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 gravity-is at the middle of its length, is exactly… … ^■^rA Fig. 195. %8.—In shed, or lean-to roofs, as Fig. 193, the horizontalj>:it*<5sure will be entirely removed, if the bearings of the rafters, asA, Bj {Fig. 195,) are made horizontal—provided, however, thatthe rafters and other framing do not bend between the points ofsupport. If a beam or…
Carpentry · Architecture
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
