A. Calculate the stress in the concrete at the top and bottom extreme fibers under a positive bending moment of 78 kip, in psi (neglect steel reinforcement) B. If f'c= 3200 psi and normal weight of concrete is used, does cracking occurs? What is the maximum uniformly distributed load the beam can carry if it is used as a simple beam with a 26 ft span without exceeding the modulus of rupture of the concrete, in Ib/ft?

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