Get your tickets to THE BIG THING 2026!
I have looked into it off and on, but never really pursued it with much vigor. If a complete grey setup were to show up at the local junkyard i would probably snag it. It would be nice to have a level cargo area!
The 1/2" ply I'm using is quite strong. I regularly carry hundreds of pounds underneath plus 10 gallons of gas & water mounted to the platform. I've also slept back there with a friend when camping so that's +300lbs of primarily static load all w/out issues. You can also go w/ a more densely packed marine grade plywood (more plys) which should be even stronger.i just question the strength of the wood in that application...
Ray your platform is made from a 5' x 5' square sheet of Baltic Birch, 12mm (1/2") thick with 9 layer. Doesn't come much stronger including marine ply.