Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 146
akened. When concreting is done in coldweather the work should be protectedagainst freezing for at least 48 hoursor until sufficiently hardened to beproof against injury from freezingtemperature. In hot weather the con-crete -should be protected from directrays of the sun and from drying… … RAISE A PIG! THIS MOTHER IS RAISING FOUR.
Architecture · Building · Construction industry · Engineering
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