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 316
e more than large enough to resist the tensilestrain upon them during the laying of the iirst part of thearch-stones below (3^ and c. 415.—In the construction of arches, the voussoirs, or arch-stones, are so shaped that the joints between them are perpen-dicular to the curve of the arch, or to its… … 304: AMERICAN HOUSE-CARPENTEE. 416.—To find the direction of the joints for an ellipticalarch, A joint being wanted at «, {Fig. 260,) draw lines fromthat point to tlie foci,/ and/*/ bisect the angle,/(^y, with theline, al; then a h will be the direction of the joint. / l)rc f ^lA e \ / * Fig. 261.…
Carpentry · Architecture
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