Some class A Mfg's claim a monocoque structure but I don't see that the claims are true when compared to air craft monocoque or semi monocoque structure. I think a pickup truck's body carries more load in its outside skin panels than a normal class A making it safer in a rollover accident. Having said that I would feel safer in a class A in any other type of an accident just because of it's size and its massive steel chassis structure which carries most of the load. The outer structure carries very little.
