A steel wide-flange section that is 18 in deep is used as a simple beam. If the moment of inertia of the section is 1160 in in4 and the allowable unit stress in the extreme fibers of the beam at the section of maximum bending moment is 24, 000 psi for either tension or compression, the greatest bending moment that the beam can safely resist is A. 3,090,000 in B. 3,240,000 C. 2,980,000 D. 3,110,000

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