13-118. A 16-ft-long column is made of aluminum alloy 2014-T6. If it is fixed at its top and bottom, and a concentric load P and a moment M = P(4.5 in.) are applied at point A , determine the maximum allowable magnitude of P using the equations of Sec. 13.6 and the interaction formula with (sb)allow = 20 ksi. | |
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