In general, ocean containers are designed and rated at maximum weights
that exceed legal U.S. and most overseas highway limits. U.S. highway
limits have some variance by state. This table indicates both the
container specifications and what is commonly considered as legal maximum
average cargo weight for highway usage:
Type of Container
Container Specification Max Cargo Weight
Highway Max Cargo Weight
20' STD or Open Top
20' Flat
40' STD/Hi Cube or Open Top
40' Flat
45' Hi Cube