The door is built up by 2 door panels, the door opening mechanism is installed on the bottom panel. During opening, the motor drives the roller on the transmitting shaft, and the lifting belts winded on the roller will open the door. Vertical doors are suitalbe for wide openings, especially for the building where there is no enough room on the top and sides of the door. This type of door is widely used on small aircraft hangars, garages, workshops and other occasions with wide openings. The door could be remotely controlled, which is safe and in low default rate.