The American house-carpenter; a treatise on the art of building, and the strength of materials (1867)
Hatfield, R. G. (Robert Griffith), 1815-1879 · New York, J. Wiley · leaf 185
that each beam is in precisely theposition of the beam in Fig. 216. The horizontal pressures atB^ being equal and opposite, balance one another; and theirhorizontal thrusts at the tie-beam are also equal. (See Art.2Q^—Fig. 209.) When the height of a roof, {Fig. 217,) isone-fourth of the span, or of… … w^IaJ fig 218. FKAMING. 1Y3 280.—In shed, or lean-to roofs, as Fig. 216, tie horizontalpressure will be entirely removed, if the bearings of the raft-ers, as A B^ {Fig. 218,) are made horizontal—provided, how-ever, that the rafters and other framing do not bend betweenthe points of support. If a…
Carpentry · Architecture
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