I used skid guard as a floor in my cataraft rower bay. 34 inches across & resting on the lower rails of an NRS frame. No other support under it, just resting on the rails. No flex whatsoever. NRS made it for me. Same stuff that they make their sidereal racks out of. The picture shows the NRS webbing floor underneath, but I got rid of that right away when I got the skid guard floor. I also used a second floor in a cataraft cargo bay. Loaded it up with dry bags. No problems.
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb