A cast-iron beam has the cross-sectional dimensions shown in the figure. If the allowable stresses are 50MPa in tension, 205MPa in compression and 55MPa in shear, what are the maximum allowable shear and the maximum allowable bending moment in this beam? Confine your calculations at the holes at section a-a. Ans: 417kN, 39.6 kN.m. 90mm-

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