The pens I'm talking about are from Petco (manufactured by Precision) each weights approx. 24/lbs each (so 48/lbs all together). I've got a plastic floor bottom in that compartment area. I'll be carrying 2 light weight folding chairs a small weber BBQ, a 12' telescopic ladder and a few odds and ends. I don't plan to carry a lot in this area. I've not yet gotten the RV weight yet loaded. Next time I go to the RV I'll look to see what if any supports are under the area in question.