Now for the fun part.
With some discussions here and other forums I decided to try a different approach for the floor. I am going to try to make a floor with 2" foam sandwiched of course with canvas on both sides. There will be a spine down the middle that will connect the hitch to the axle so I think it should be plenty strong enough.
Here is the floor getting cut out.
I cut dado's along the sides. This is where the walls will bed into the floor since I am doing away with the inner frame rails. Inner frame rails would be hard to install in foam anyway.
I am painting both sides of the floor with bonding primer before applying the canvas.
so I weighed the foam floor and it weighs 4lbs at this point. That is 29lbs. lighter than the OSB floor I made already. I hope this works well because that might get me in under 50lbs. for the complete build.
Well I am waiting for canvas to dry as I type. Hope to get the other side of the floor done tomorrow morning so I can start piecing this thing together.