The floor type door covers are suitable for unloading platforms and are not installed directly on the wall of the building. It provides a good insulation solution for the loading and unloading area. The shear type frame structure The design of this frame structure, the standard extension of 1 meters, the longest can be 4 meters; The framework of firm structure The frame structure is formed by the pressing of the positive alumina. It is of good corrosion, light and firm; The high performance polyester material Both sides of the frame are covered with high toughness and tear resistant high quality polyester material; The composite plastic wheel The track is mounted on a plastic composite wheel and can be operated manually or electrically; The fixed angle The top of the vinyl fabric and the side door cover are fixed on the frame structure by the aluminum angle fixing strip. The standard height is 3450mm, 4800mm (floor type); The standard width is 3450mm; Standard depth is 770mm;