installing a bunk bed on aluminum frame

if you can find the square tube these will hold

http://forum.expeditionportal.com/threads/128148-Building-an-over-dinette-bunk


i also saw a fabrication made from pvc tube.
It was set up using the dinette seat as the base platform to support the freestanding weight of the homemade pvc bunk frame.
If you remove the dinette cushions that will leave the exposed plywood which would act as the foundation to support it.

I would think its possible to fabricate some kind of "flat' hardware (part 1) that could be mounted to the dinette seatback and left in place, covered by the cushion when not being used as a bunk.
To make the bed, remove the cushion, slide part 2 of the flat hardware that is part of the bunk framework. You could use the dinette cushions for the bunk.

I wonder if large pop rivets could be used if you can find the aluminum studs? I bet a stud finder would find the studs.

elnino wrote:
... someone suggested to me to go all the way thru with a lag bolt to the outside?

:E No! Never! Bad idea! Bad, bad, bad!

If you hit the aluminum studs, you can attach to them, but hitting them exact is the real challenge.

Easier solution?

Build an interior frame from the floor up on the inside of the camper. Attach the new beds to it. You may have to customize and fit it all, but I think that's what I'd do. Liquid Nails would hold the frame (stud work) against the walls. Once it all joins together, it should be self supporting and locked in. You could even get creative and figure a way to add shelves or cabinets to it for more storage.