The door leaf consists of several 300-1000 mm wide elements (depending on the door width). The separate elements are joined to a sturdy door leaf through a special linking system so that no concavities, respectively screw heads are visible. The thickness of the door leaf is 62 mm. The surface is completely level and consists of zinc-coated, 0.75 mm thick steel sheets. The steel sheets and the fire protection filling are caulked all over. The running-in profile and the labyrinth profile are zinc-coated.
Each door element is guided in ball bearing mounted castors. The cold-milled, zinc-coated C-profiles are mounted to the ceiling by means of brackets. The guide rail casings are zinc-coated.