thrust depends on the cohesionof the earth, the dryness of the material, the mode ofbacking up the wall, and other conditions which wehave no means of ascertaining. Experience has, however,shown that the base of the wall should not be less thanone-fourth, and the batter or slope not less than… … sectional areas of walls of different shapes, that would berequired to resist the pressure of a bank of earth 12 feethisrh. ART OF BUILDING. 323 Fig. 16.
Architecture · Building
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