I wanted to mount my workout plates to the wall so I designed this wall mounted plate holder. I've tested it with a 55lb plate and it's held up so far but you can always increase wall numbers and infill density as needed.

It's currently printed on its side with support so it comes out a bit ugly. I've printed it up and down before and it's a much better looking print but won't hold more than 10-20lbs. When screwing to wall, make sure that the top and bottom of the part goes to the sides (the bad looking sides go left and right) the layer lines are stronger that way.