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A simply supported beam spans 20 ft and carries a uniformly distributed dead load of 0.8...

A simply supported beam spans 20 ft and carries a uniformly distributed dead load of 0.8 kips/ft including the beam self-weight and a live load of 2.3 kips/ft. Determine the required plastic section modulus and select the lightest weight Wshape to carry the moment. Consider only the limit state of yielding (Zone 1) and use A992 steel. Design by (a) LRFD and (b) ASD.

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