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
e beam, A B ; draw d e, parallel to Bb ; then b e, (by the same scale,) equals the pressure in the direc-tion, b A ; and e d, the pressure against the wall at B—and alsothe horizontal thrust at A^ as these are always equal in a construc-tion of this kind. Fig. 194 represents two equal beams,… … Fig. 194. pressures at 5, being equal and opposite, balance one another;and 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…
Carpentry · Architecture
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Rudiments of the art of building : represented in five sections [...] for the use of architects, builders, draghtsmen, machinists, engineers and mechanics (1853)](https://img.insideoutlibrary.com/img/200/ia-rudimentsofartof00bull-75-44.webp)
