Camex new and used Flat Deck Trailers or Highboy Trailers (hiboy) consist of a load deck, landing gear (legs which can be lowered) to support the trailer when uncoupled, side rails and winches for tie down. They can haul various types of freight for all industries. Two flat deck trailers coupled together are referred to as Super B’s. Common widths of flat deck trailers are 8 ft. (2.44 m) and 8 ft. 6 in (2.6 metres). Standard lengths are from 28 ft. (8.53 m) to 53 ft. (16.15 m).