A square concrete column is 4 in by 4 in cross-section and is subject to a compressive load P. If the compressive stress cannot exceed 4000 psi and the shear stress cannot exceed 1500 psi, the maximum allowable load P is most nearly:

64000 lb

Explanation:

A square concrete column is 4 in by 4 in cross-section and is subject to a compressive load P. If the compressive stress cannot exceed 4000 psi and the shear stress cannot exceed 1500 psi.

The area of the square concrete column = 4 in × 4 in = 16 in²

The compressive stress (σ) cannot exceed 4000 psi.

Compressive stress is the ratio of load applied to the area. Therefore the maximum load is the product of the maximum compressive stress and the area. The maximum compressive stress is given as:

Therefore the maximum allowable load P is 64000 lb

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explanation: