Chicago : Engineering and Contracting Pub. Co. · leaf 166
Slopa Jfo. Granite … Fig. 63.—Granite Returns. The average crushing strength of 2 in.cubes, taken from any part of the brick shallnot be less than 12,000 lbs. per sq. in. The specific gravity shall not be less than2x/4, and each brick must be toughened bythorough annealing in the kiln. The loss in weight of any whole…
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Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
