Draw and dimension the load and reaction diagram, the shear diagram, and the bending moment diagram for the beams shown in the following figures:
A simply supported beam is 60 in. long and carries a 5000 lb load at the center.
(a) If the cross section is a hollow square 6 in. high on the outside and 5 in. high on the inside, find the value of the maximum bending stress.
(b) Suppose the cross section is a hollow circle of the same area as for part (a) with wall thickness equal to 0.5 in. Find the value of the maximum bending stress.
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