ile less than 2inches at each fall; in general, holes are made in the ground 3 ft. 6 in.deep for the piles before they commence driving: by adopting thismethod the piles are not pointed, consequently they offer greater re-sistance and stability : after they are properly fixed, they are cut off toa… … 2G. Fig. 27. 6 by 10, and never lessthan 20 feet long ; theedge of the plate ishollowed nearly nninch in depth, to al-low for the play of thewheels, and the ironrail projects a trifleover the edge. Therails, lig. 20, are 2£wide and one inchthick on the inneredge, and | of an inch on the back edge.…
Civil engineering · Architecture
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