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 176
ng it in o and o / then f o will bethe horizontal thrust at B^ and e o at A ; these will be foundto equal one another. When the rafters of a roof are thusconnected, all tendency to thrust the walls horizontally isremoved, the only pressure on them is in a vertical direction,being equal to the… … Fig. 211. .—Fig, 210 and 211 exhibit methods of framing for sup-porting the equal weights, W and W, Suppose it be required 164 AMERICAN HOTJSE-OARPENTEK. to measure and compare the strains produced on the pieces,A B and A C. Construct the parallelogram of forces, e hfd,according to Art. 258. Then…
Carpentry · Architecture
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