12-90. The simply supported beam carries a uniform load of 2 kip>ft . Code restrictions, due to a plaster ceiling, require the maximum deflection not to exceed 1>360 of the span length. Select the lightest-weight A992 steel wide-flange beam from Appendix B that will satisfy this requirement and safely support the load. The allowable bending stress is sallow = 24 ksi and the allowable shear stress is tallow = 14 ksi. Assume A is a pin and B a roller support. | |
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