Flatbed freight is the transportation of cargo on open-deck trailers — standard flatbed, step deck, double drop, or removable gooseneck (RGN) — used for freight that cannot be enclosed in a standard dry van due to its size, shape, or loading requirements. Heavy haul refers specifically to shipments exceeding standard legal weight limits, requiring additional axles, permits, and in some cases route surveys and escorts. Both categories require specialized carriers, permit management, and load securement expertise.