Abstract: A unit for returning a cover of a trailer comprising a first portion, a cord, and a spring. The spring is connected to the first portion. The cord having first and second ends, the first end of the cord being connectable to the first portion, the second end of the cord being connected to the cover, and the cord being wrappable around the first portion.
Abstract: A wall section is disclosed for a trailer. The wall section comprises a male end and a female end. The male end includes a central recess having at least one protrusion on each side of the central recess, the protrusions defining respective lateral recesses. The female end includes a central protrusion having at least one lateral protrusion on each side of the central protrusion, the central protrusion and the lateral protrusions defining respective recesses.