Question: select lightest section neglect bock shear given a wt6 with...

Select lightest section, neglect bock shear. Given a WT6 with D = 80k, L = 120k,  

      length 20 feet, A992 steel. The end connection is a longitudinal weld to flange only

      (weld on each longitudinal edge of flange) and it is 6 in. long.