Weight of all accessories installed on the door panel
8、12、18、32
flat wheels
Is anti fall installed
Note: Standard lift doors are equipped with a cable break safety device or a torsion spring break safety device. Special consideration must be given when designing the torque of the torsion spring. Ensure that when the door is fully opened to the top position, the anti-drop device does not get caught in the track and that the pulley continues to rotate without being blocked by the anti-drop wheel on the torsion spring shaft.
If a cable break and fall protection device is installed, bumpers (door pushers) must be installed at the rear end of the track.