Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 472
-quoins. The side-wallsto extend 21 above the upper gate-quoins, and 14 below lower gate-quoins. If the bottom is of earth,and not sufficient to support the foun-dation, then bearing-piles of hardwood, not less than 10 diameter atsmall end, shall be driven. The foun-dation timbers to be 12 x 12,… … Fig. 1073. 456 ENGINEERING DRAWING. If without bearing-piles, the foundation to be composed of timber, 13 thick andnot less thari 10 wide, counterhewed on upper side, placed at uniform distance, accord-ing to their width, to occupy or cover at least f of the area of the foundation, andunder the…
Mechanical drawing
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