Casita Seat Rail replacement issue

[GMike A]

The OSB curved seat support on both back sides of the egg are partially rotted and flake away. I dont see any rivets at all and what is still attached seems rock solid to the touch.

Does anyone know how they were originally attached to the shell? I am going to have to replace both sides and will take whats left to make templates. If any have replaced theirs what did you use and how? I am thinking 1/2 or maybe 3/8s inch plywood since most of the support will be not at the back but more on the front cross member of each seat section.
Thanks again

[Donna D.]

I'm confused. Is the rear cabinetry (I think that's what you're asking) NOT fiberglass? I was intially thinking the "wall" supports for an SD.... but I see you have a Liberty...

Do you have any pictures Mike?

[GMike A]

Sorry for Delay - Life got in the way. Here is what I was referring to. I will try to find some older threads too from perhaps Robert or others. This the rear seat rail.
Thanks

[AimeeNoelle]

Ours are still rock solid in our '84. I think the rails are epoxied in from what I can see.

[GMike A]

Thanks Aimee. I had major water damage from neglect from a "Longhorn" can you imagine that. Water damage to 90% of the floors. Not sure how they did it but I am replacing all the OSB. Both sides were damaged and are flaking off. There were no rivet or bolt holes external so epoxy or 5200 must have been used. I will tear them down, grind the FG down and re-do them.
Gracias.

[AimeeNoelle]

We, too, had extensive water damage. We just got done replacing the subfloor with new treated plywood. I cannot wait to start reinstalling the benches and other forms, but we gotta do the re-wiring and re-plumbing first. If I had a magic wand, I would zap myself the necessary skills. I do have a set of photos you can look at if you want. Here's the link:
https://www.facebook.com/media/set/?...4000804&type=1