A simple beam AB is loaded as shown in the figure. Calculate the required section modulus S if σallow = 17,000 psi, L = 28 ft, P = 2200 lb, and q = 425 lb/ft. Then select a suitable I-beam (S shape) from Table E-2(a), Appendix E, and recalculate S taking into account the weight of the beam. Select a new beam size if necessary.

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