The beam below is the same beam that you analyzed in Lab 3, but with an additional roller support added at midspan.
a) Determine the load diagrams for the beam for all LRFD load combinations.
b) If the beam is a 40 foot W18x50 steel wide flange beam, determine the maximum compressive stress you would have to design for in the cross section. Assume that the roller support and the point load are both located at the center of the span.
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