Kidder, Frank E. (Frank Eugene), 1859-1905 · New York, Comstock · leaf 310
esque architecture. A semi-circular arch is one of the best shapes for supporting awall. It must, however, have sufficient abutments, and the depth ofthe arch-ring, or the norma] distance in feet from the intrados tothe extrados should be equal to at least 0.2 -f V radius -f half span Arches used… … Fig. 138.—Built-up Stone Arch. intrados and extrados concentric, as there is more waste to the stone,and more patterns are required. They have a more pleasing appear-ance, however, and are also stronger. Voussoirs of the shape shownin Fig. 137 must be cut with extreme accuracy. In dividing an arch…
Building · Carpentry · Masonry
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