US Patent 7478865 Trailer assembly

A trailer body for use with a commercial motor vehicle is provided, including a top wall, a floor, and a pair of side walls cooperating to define a cargo space, and a plurality of supports each extending substantially across the trailer body between the side walls. The top wall includes an interior surface and an exterior surface, and the supports are connected to the exterior surface of the top wall such that at least a substantial portion of the interior surface of the top wall is generally smooth. The trailer body may also include a protective assembly adjacent to a rear door of the trailer body to protect the trailer body during loading and unloading of cargo into and from the cargo space.