San Francisco : Architect and Engineer, Inc · leaf 331
was tamped in uniformly.The placement of the reinforcing steel had a feature of inducing of a plane of cleavage in order to keepcracking and shrinkage under control. The 30 day strength averaged 3500 lbs. per sq. in. with a lean mix.Early strength would show low. The texture of the placed mix… … Tamping concrete into slip forms,showing lock with hard rock foun-dations.
Architecture · Building
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