25 years a go when i stared,there were A,B,C,D,E.A was a car or 1/4 ton van,infact the guy that told me about Roberts Express had his Cadillac signed on as an A so he didnt have to pay taxes on it when he purchased it.
an A would haul letters small boxes,but ovr the years,it was discontinued,so you only have B up to 2000 lbs,C 5000 lbs D 13000 lbs And E 44000 lbsmy weights might be alittle of for some of the carriers but they are pretty close