I made this out of about $18 worth of parts that I picked up at The Home Depot. It works really well for our purposes. I drilled the 2x4's about half way through to place the dowel into. I then screwed it in from the back and side after glueing with wood glue and attached the whole thing to studs using 4" lag screws. I am pretty sure it is strong enought that I could do pull ups on it but I am not willing to try.