How much does a truck weight with a trailer?

A fully loaded 18 wheeler weighs 80,000 lbs. This is the legal weight limit in most states. The empty weight is between 42,000 for the average flatbed, and around 46,000 for the average van trailer, both with tractors attached. Some states allow higher weight limits. Michigan currently allows the heaviest trucks, up to 164,000 lbs, providing the unit has sufficient axles. This requires 11 axles. I drove trucks my whole life.