The larger the size of the overhead sectional door, the lower the wind resistance. At this time, you can choose a door panel with a large back rib to enhance the wind resistance. Secondly, the torsion spring balance system is also necessary. If the door opening is too large, it is necessary to add torsion springs to reduce the load of the door panel on the motor. Conventionally, there are two torsion springs. It is recommended to add two more torsion springs for large sizes to ensure the safety of the lift door during operation.

    The height of a single door panel of the overhead sectional door is 50 cm. If it reaches a height of 10 meters, 20 door panels are required. It is conceivable that the weight of the entire door panel is too large. At this time, a particularly important safety device is needed - steel wire rope Anti-fall device to ensure safety. Under long-term use, the wire rope will inevitably break, and the device will trigger the protection to block the door panel and prevent it from descending. If there is no such device, the whole door panel will be smashed down to damage the door body, and even cause casualties. Many cheap overhead sectional doors will reduce this device. The reason is that the cost is too high and there is no profit.

    At the same time, the lift door is equipped with an airbag as standard. When it touches an object, it will stop running immediately and open in the opposite direction, which increases the safety during use. This is also a device that lifts the cost of the door, and is often omitted by some cheap manufacturers.