Boy i never relized how lucky we are here in WV ive been dot checked around 10-12 times over the last few years and have never even heard of a dot officer checking the door post weight if they did most of us could only haul 1000 pounds in our f350 size dumps and maybe 3 tons in a 550 . I own both sizes and have always wondered why my s10 pickup can haul more than my f350 according to the door we buy plates to cover about 3 ton on a 350 and 6 ton on a 550 . Even our L9000 dump only has a door weight of 35000 and is legal here with 40000 if you buy the plates . Now with combo weights we generally dont go full GVW on both when buying tags for the truck just light weight for both plus what ever you plan on putting on the trailer mainly because ive never felt the need to put 10 of gravel in the dump while towing a tag with a 10 ton exc on it to me thats crazy although i see it once in a while ive never wanted to pay the extra money for the plate and the extra insurance for higher gvw . I know guys with 35000 tags on a f350 to cover there truck with dual tandem gooseneck but who really should be putting 20000 pounds on a trailer behind a truck that size .All because the tv comm says you can doesnt mean you should .