Practice

A cast-in-place concrete wall 12 ft high, 8 in. thick and 80 ft long is placed in one lift, uniformly along its length, at 10 yd³/hr. The concrete is normal-weight (145 pcf), made with Type I cement and a retarding admixture, and its temperature at placement is 60°F. Using ACI 347, the design lateral pressure on the wall forms is most nearly:

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