An air-conditioning unit weighing 1500 lb is bolted at the middle of two parallel simply supported steel
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Question:
An air-conditioning unit weighing 1500 lb is bolted at the middle of two parallel simply supported steel beams shown in Figure 02. The clear span of the beams is 8 ft. The motor in the unit runs at 500 rpm and produces an unbalanced vertical force of 70 lbs at this speed. Neglecting the weight of the beams and assuming 5% of critical damping in the system.
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