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Step decks, double drops, and permits
Taller freight needs a lower deck, and maybe a state permit.
A step deck's lower deck is typically around three and a half feet, so freight that will not fit a van or a standard flat can sometimes stay under a common height limit. A double drop or removable-gooseneck trailer sits lower still.
When height, width, length, or weight exceeds the road, each state on the route can require a permit. Escorts and travel hours vary. Do not promise the day before the paper exists.
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