Why must metal coils be transported on flatbeds rather than enclosed trailers?

Metal coils must be transported on flatbeds primarily because they are often too large and heavy for enclosed trailers. Flatbeds are designed to accommodate bulky and heavy items, making loading and unloading easier, often with the use of cranes or forklifts. This open design prevents weight and height restrictions that would typically limit the use of enclosed trailers.

Enclosed trailers have constraints regarding dimensions and weight, which can prevent the safe transport of metal coils, especially when they're at the upper limits of legal limits for height and weight. Flatbeds facilitate the transportation of these coils without the risk of damage that could occur if they were confined in a trailer that does not provide sufficient space or structural support. This practical consideration ensures safety and compliance with transportation regulations regarding heavy loads.