Flatbed semi-trailers, which do not have enclosed sides or roofs, can typically carry heavier loads than dry vans. The payload capacity of a flatbed semi-trailer can range from 40 to 60 tons (36,288 to 54,432 kilograms) or even higher.
Tanker semi-trailers, which are used to transport liquids, can have payload capacities that range from 10 to 40 tons (9,072 to 36,288 kilograms). The payload capacity of a tanker semi-trailer will depend on the specific density of the liquid being transported.
It is important to note that the actual payload capacity of a semi-truck can be affected by various factors, such as state and federal weight regulations, the type of truck and trailer being used, and the axle weight ratings. The weight of the cargo must also be evenly distributed throughout the trailer to ensure safe and efficient transportation.