Raymond, William Galt, 1859-1926, Raymond, William Galt, 1859-1926. cre · New York, J. Wiley & sons, inc · leaf 95
d for a time, the set of the materials around thepile seems to give additional supporting force, and the pilesmay be safe, though not realizing the full requirements of theformulas. The engineer should not accept such pile drivingunless experience in the vicinity has taught him its safety.If rock… … 72 CUL^^RTS, BRIDGES, AND MINOR STRUCTURES in driving to use a hammer in which the hammer is not tripped,but carries the rope down with it; but the test blow should bemade with a hammer that trips, since a better blow is thus insured. Piles are cut off at the proper level to receive the cap.…
Railroad engineering
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