6. Select the lightest steel wide-flange section (W33 shape) for the beam shown. Assuming that flexure controls the design (moment controls the design). Do not consider beam weight. The allowable bending

stress is 30 ksi (Fb = 30 ksi). Given: E = 29,000 ksi R₁ = 55.25 kips +55.25 0 50 kips + 18'-0" -12.75 30-0 -1 kip/ft +37.25 832.5 B Load diagram R = 42.75 kips 0 Shear (V) diagram (kips) -42.75 Moment (M) diagram 0 (fl-kips)