Vu.. 70.—D.;uble-fac^d wall. … Figs. 71, 72.^Elements of the portico. intervals, lest they should break with their own weight or with thatput upon them. The walls, architraves, and vertical supports arealways far stronger than the mere weight of the roof would require. Dressed Constructiox. 109 The following woodcut shows the…
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