4. (20pts) A 20' long beam is supporting an exterior wall that loads the beam with a weak axis load of 240plf (wind) while the strong axis supports a floor that loads it with 2k/ft live load and 1.5k/ft dead load. Select a W section that can carry the loads using A992 steel. The beam is supported by the floor continuously and the wall is attached to the beam at 4' intervals. Use the LRFD method and show all work. 240p/f k 20' Weak Axis Bending - 20' 1.5K 15+ 25151 Strong Axis Bending