The support brackets are bent steel that comes out from the wall 5 inches. (The mattress is 4" and the steel tubing is 1") On the bent side that attaches to the wall, there are two holes drilled every six inches, so there are about 16 screws holding it to the wall. There are also two holes in the base as well holding the frame in place.

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The beds are mounted to the support frame with 7/16" 2 inch quick remove clevis pins. The beds came be moved into:
1. low bunk / couch position with upper bunk creating a slanted back support
2. two Bunk beds
3. Using Vertical e track, beds can be connected to each other side by side. This can be raised or lowered as needed using the e-track based on gear storage below.

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There are two different height support brackets for the other side of the bunks that stow behind the beds. I probably would have made those "flip down" legs, but the guy who welded them did them as "pin on"
It was important to me that this still function very much as a cargo trailer to move my gear and then have with creature comforts and a dressing room when I arrived to a show. Because of this, the only "permanent" mounted items are the e-tracking, the 24"x24" shower base, which is 3.5 inches high and has a tight fit cover so I can put things on top of it if needed, the support frame for the bed and kitchen area that is only in the "v" area of the trailer (which means I still have a 6x12 on the floor cargo trailer)