I've never worried much about any of a vehicle's weight ratings. When I towed 30,000 lbs behind my 3/4 ton I suspect most vehicle weight ratings were grossly overloaded yet I would have been close to legal as far as the road is concerned. When my Kenworth tridrive is loaded to its normal gross weight of 93,000 lbs I might be slightly over some of the vehicle weight ratings (I've never looked to see what the gvwr of the truck is but I believe the axles are rated for 89000 lbs). However, if I go on the road like that I'm over the legal axle weight ratings for our roads by about 26000 lbs.
