OCDbikr wrote:
I can't imagine this being so complicated... Do RV companies not make their vehicles to be able to have 2, 250lb men in the back bedroom? I mean, other than just a few feet of disbursion difference, that's exactly what we're talking about here... Two men, standing on the rear bumper, if you will (if the rear bumper were welded in place by 3 separate mounting tubes affixed to the frame rails)
At least some RVs would have the rear axle overloaded if one were to travel with two or three comparatively heavy guys in the back bedroom. (For that matter, there are some that are overloaded with three rather skinny people and full water and nothing else, regardless of where the people sit...) The dynamic load of driving with the weight there is quite a different stress on the frame and chassis than the relatively static load of their bedding down there while camping.
Carrying around 750 pounds perhaps ten feet in back of the rear axle is not an insignificant load on the frame and chassis. It certainly would be possible to design a class C RV in which it could be done safely, with framework and so forth to suit the load; still, for a great many units actually available, it's simply not practical and in some cases would be decidedly unsafe.