2. For the beam shown, calculate (a) the maximum bending stress and (b) the bending stress at a point 0.5 in. from the top of the beam on section D. Ans: (a) 10.12ksi; (b) 5.06 ksi Compression 2000 lb 3 ft→ B D A 6 ft 6 ft E 2 in. 4 in.