Much like Exercise 19.9, a steel beam with a span of 20 ft will support both a concentrated load of 20 kip at the beam center and a uniformly distributed toad of 2 kip/ft across the entire beam length. However, in this case, the beam is fabricated of ASTM A572 (Fy = 50 000 lb/in2) steel. Use the calculation approach to find the lightest W-shape section with a depth not to exceed 20.00 in deep that will carry the load safely. Include flexure (bending), deflection, and web shear investigations in your analysis.
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