Freight weight is a term used to describe the amount of cargo that can be carried by a vehicle or vessel. It is usually measured in tons, loads, and TONNAGE. A TON is a unit of measurement equal to 2, 000 pounds, while a LOAD is a unit of measurement equal to the amount of cargo that can be carried in a single trip. TONNAGE is a measure of the total weight of all cargo that can be carried by a vehicle or vessel.