I really like what you did, I want to built something very similar to this for my suburban.
I have a couple questions:
Where did you buy the square tube used for the drawers?
Did you use ¾ ply for the top and is there any sagging with the weight of 2 people sleeping on top?
Thanks…
The square tubing was sourced from our local welding shop. It's simple 1/8" wall, 1" square tubing. Be sure to ask for tubing with SQUARE corners. Tubing can come with fairly soft, rounded corners which may cause issues with your bearings. A larger, flatter surface is apparent on the SQUARE cornered stock. I have one rail on my setup with the rounder stuff and I will be replacing it eventually - not looking forward to it!
Yes, the top of the setup is all 3/4" birch plywood. There is absolutely no flex with the two of us (and dog!) up there. The drawer carcass provides three vertical supports across the width, so that means a support every ~24". That is similar to residential building code in many areas!
Thank you for your interest - be sure to let me know if you have any more questions once you get deeper into your build on your Suburban.
-=D