Ancient and modern engineering and the Isthmian canal (1903)
Burr, William H. (William Hubert), 1851-1934 · New York, J. Wiley & Sons; [etc., etc.] · leaf 181
0 pounds per linear foot; in other words, averaging 500 pounds per square foot of upper surface projected in the line E'O. The total length of the arch-ring, measured on the soffit, is about 113 feet, and it is divided into ten equal portions for the purpose of convenient computation. The radial… … C Fig. 38. The horizontal line drawn to the left from / gives the vertical projection of that part of the extrados between d and /, and the horizontal earth pressure on df will be precisely the same in amount as that on the vertical projection of df, as just found. In the same manner the horizontal…
Civil engineering · Canals, Interoceanic
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