I worked on a commercial job last year where we had to build an office that included a 42-in. tall, 5-ft. long wing wall. The wall was built out of metal studs, covered with drywall and finished along its top with a wood cap. The wall was held at one end by a bearing wall, but the only anchors holding the rest of the wall were the powder-actuated fasteners driven through the track into the slab. This had me worried. I was sure that, in time, people leaning on the wall would eventually weaken it to the point of collapse. So I strengthened the wall with concrete.
First I drilled a couple of 1/2-in. dia. holes through the track and 6 in. into the slab for a pair of #4 rebar. As shown in the drawing, I placed them in the outermost bay of the wall. I used heavy-gauge steel studs for the two outer studs and turned them so that the flanges faced each other to lock into the concrete better. Then I screwed some scrap 5/8-in. plywood to the two studs, making a 3-ft. tall form. Filled with concrete, the end of the wall became a cantilevered beam that is quite strong. The drywallers glued the drywall to the concrete, and we were done.
Chris Sturm, Hamburg, PA