A REAR VERTICAL MEMBER AND DOOR MOUNT ASSEMBLY FOR VEHICLES, OR CONTAINERS, WHEREIN THE REAR VERTICAL MEMBER INCLUDES A REARWARDLY EXTENDING PART WITH AN ANGULAR, TRANSVERSE, UNBROKEN FLANGE AT THE REAR. THE DOOR REAR EDGE SEALS AGAINST THE VERTICAL MEMBER AND IS HINGED TO HINGE BUTTS WELDED IN THE ANGLE OF THE VERTICAL MEMBER REARWARD EXTENSION AND TRANSVERSE FLANGE. THE HINGES ARE OFFSET TO RECESS THE DOOR WITHIN THE VERTICAL MEMBER AND TO PROVIDE CHANNEL SEATS FOR THE VERTICAL MEMBER TO ALLOW THE DOOR TO SWING IN A 270* ARC.