Re: diy wooden squat rack with pull up bar
I am not an engineer, but I would suggest using 4x4 posts instead of the doubled up 2x4s for the uprights.
Also I don't like the idea of drilling holes for the j-hooks right on the seam of the two 2x4. Over time I can see the j-hooks acting as a wedge causing the 2x4s to split apart. This issue would be eliminated with a 4x4 post.