1. Tracks: made of aluminium. Leaf-guidance, sustain-track, safety device are sealed in it.
2. Steel frame. The galvanized steel frame, which can hold leaves.
3. Driving system. It is droved by chain. The door machinehas the function of thermal protection. And also it can be adjusted to be manual-driven.
4. Door plank. It uses double-deck GRP shutter as the main material, which is 50mm in thickness and 490mm in height. The upper and lower closed profile, including side wrapping of guide wheel is made of aluminium.
5. Sealing system. Shutters: rubber pipe. Lintel: rubber lip-packing. At the bottom: hollow shape. Sideway: brush.
6. Safety system. The air-bag system and mechanism system act as a double protection.
7. Control system. Wiring is operated in panel box with voltage of 24V.