The B750 Sereis Dock Door Shelters are designed for use on dock doors up to 10' x 10'. It assists in energy saving by sealing out the outside elements. This Loading Door Shelter unit is designed for the truck to back into the shelter, not against it. The side and top curtains act in a wiping action against the side and top of the trailer, providing a complete seal. When the trailer is in place at the dock, access is accomplished at the rear of the trailer to facilitate loading and unloading procedures.