So I made my own DIY stall bars for my garage. My bars are 4ft wide and 8ft tall. I used 1 3/8 birch dowel and white pine 2x6 beams. When ever I step on one or hang from one they bend quite a. It. I weight 200 lbs and 6 ft tall. I was told the birch would be strong enough for me. But I am very nervous about it. The only reason I can come up with that it. Bends that much is that I don't have them seated far enough in the beams. Would that cause them to bend? Any and all help is much appreciated