Bought this and the matching bar stand to use as a pair. The door jamb was unfinished and protruded about a half inch from the outside 2X4 frame, so I didn't go with a 2X4 lumber but used a 1" x 4" piece of oak hardwood which I think would work just as well would work. The fit is snug, but there's still enough room to take the barbell out. I added a drawer handle on one end of the hardwood to make it easier to slide in and out.
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