The rigid beam is supported by the three posts A, B, and
Chapter 4, Problem 4-107(choose chapter or problem)
The rigid beam is supported by the three posts A, B, and C. Posts A and C have a diameter of 60 mm and are made of a material for which E = 70 GPa and \(\sigma_{Y}=20 \mathrm{MPa}\). Post B is made of a material for which E’ = 100 GPa and \(\sigma_{Y}^{\prime}=590 \mathrm{MPa}\). If P = 130 kN, determine the diameter of post B so that all three posts are about to yield.
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