Standard Specifications for Cement Hollow Building Blocks
ACI Committee on Specifications for Cement Hollow Building Blocks
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Hollow cement blocks made in accordance with the following specifications, and meeting the requirements thereof, may be used in building construction, subject to the usual form of approval required of other materials of construction, by the bureau of building inspection. The cement shall meet the requirements of the Standard Specifications for Portland Cement of the American Society for Testing Materials and adopted by this Association. (Standard No. 1.) January, 1906.