The Architect & engineer of California and the Pacific Coast (1905)
San Francisco, Calif. : Architect and Engineer Co · leaf 498
n buildings of this kind there is dif-ficulty on account of the heated air ris-ing to the roof, and passing out throughthe ventilators. This acts like a chimney,and draws in cold air througli every open-ing around the windows and doors attlie floor level, causing bad drafts, andalso wasting a great… … Here is a photograph of thePratt Building MaterialCos. (C. F. Pratt, Pres.), washedconcrete gravel ranging in sizefrom 0 up to 1 Vo inches. There is30% of washed sand from 0 to /g2i% oi crushed rock and 45% of-^fc^-; gravel from s to IJ-2 inches. Weabsolutely guarantee not over 21 %of voids, just…
Architecture · Building
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