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B 20kip A 20 kip load is applied to the 3-bar truss structure in which all three members have identical lengths of 10 ft. and

B 20kip A 20 kip load is applied to the 3-bar truss structure in which all three members have identical lengths of 10 ft. and identical cross-sectional diameters d. The steel in the bars has a yield stress of 42 ksi. If a safety factor of 2.5 is required against yielding of the bars, what is the required minimum diameter dmin of all three bars?   


 

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