A support assembly has laterally spaced horizontal base rails. The support assembly has laterally spaced vertical rails. The vertical rails extend upwardly from the base rails. The front vertical rails house a safety rod to catch the pivot rails. Pivot rails have interior ends and exterior ends. The interior ends are pivotally coupled with respect to the vertical rails. A cross bar is coupled to the pivot rails adjacent to the exterior ends. A plate is coupled to the pivot rails adjacent to the interior ends. The plate has recesses. The recesses receive and support attachments.