Anyone interested in 83 Pace Arrow Tear down and Rebuild?

And finally, we add plywood, and yes, glue that to the blue board insulation, and also to the top of the 1.5" square steel tubing.

So, we have a floor, that is glued together, and then bolted to the frame, on the bottom.

That does make for a solid floor - at least for a while, and that is why they can get away with using 1/2" plywood on the floor. Eventually, from walking on it, some of the glue will loosen and then the floor gets spongy.