Abstract: A rack is easily positioned on and fixed to the sidewalls of the open box of a pick-up truck having a truck cab, the rack incorporating a pair of raised supports and interconnected frame members each positioned above the plane of and fixed to the upper free end of one of the truck box side walls, and a shelf spanning the width of the truck box and pivotally connected to the frame members, the shelf being optionally movable between a first or lowered position, wherein it supports a load, while allowing space therebelow in the truck box for the storage of large articles, and a second or raised position, wherein it provides a barrier for protecting the truck cab from damage while allowing full access to the truck box for the transport of tall articles.