Abstract: A removable and raisable roof attached to four upright supports is mounted on an open bed trailer. Two supports are located on the left and right corners of the forward edge of the trailer; the other two supports are similarly located at the rear corners of the trailer. No side supports are necessary. Using elevating means within the supports, which can operate independently or in tandem, the front and/or rear portions of the roof can be raised and lowered separately. Using external attachable fixtures and ground mounted supports, each of the roof supports can be lifted from their mounted position on the trailer bed and the trailer driven out from under the supports and roof assembly, converting a covered van to a fully open van. If a fully enclosed trailer is desired, then tarpaulin, or other readily removable wall materials can be suspended from the roof and attached to the trailer bed.

Abstract: Apparatus for securing freight in the form of a plurality of articles which are stacked on a floor to form a geometric solid, the solid having an upper edge, the apparatus being composed of: a frame which is composed of a roof and support members which support the roof above the floor; an edge protector assembly having at least one edge protector formed to rest against a portion of the upper edge of the geometric solid; a lifting mechanism including at least one cable via which the edge protector assembly is suspended from the roof, the lifting mechanism being operable for vertically displacing the edge protector assembly to lower the at least one edge protector into contact with the upper edge portion; and strap members for directly securing the at least one edge protector to the floor.