I glued and bolted in a 4 inch steel plate on wall to help with sag.
I was only able to get wall to move a little bit with a jack, after that the camper just lifted. There is still sag when looking at how the the two clam shell halves line up, but the plate will help and help prevent future sag I hope.
I was hoping to lift the wall past straight to pre-load the steel plate, but it just wold not move that much.
The new wall will cover this and cabinets will cover where Im keeping wall. Will also give a solid place to bolt things, like bunk bed cable…
The plate is pretty thick and has a 45 degree bend on top, which gives lateral stability, keeps wall from bowing. It resembles a vinyl floor molding you see in commercial buildings, but heavy steel instead.
Close up of plate.
I plan to run a crossmember, as mentioned before, similar to the bathroom wall ceiling board. I can now weld a bracket to this plate for the board on this side (on other side will have to run a vertical support down to ledge)
Not sure how much this plate will sag when I remove the jack, I will let glue dry overnight before finding out. i bolted the plate in the center, above door, first, then the right side, then pushed up, preloading the plate, as hard as I could before bolting in the left side, so maybe that will help.
Door dead bolt engages now, so will see what happens…
***Update a day later..
After glue drying a day, I let the jack down. Good news is that it only sagged less than 1/4 of an inch when the jack lowered. The dead bolt locks into the hole easily, something it did not do before without lifting strongly up on the door (maybe part due to hinge sag).
Hoping it does not settle further with the coming days.
Some odd things happening - front side of door rail is higher than rear as measured against the lower half rail, but I'm not looking for things to complain about at this point.
I think this fix is sufficient for the life of the trailer.