How far from being closed will the hall door not begin to close if using power-operated vertical bi-parting doors?

The correct distance at which the hall door will not begin to close when using power-operated vertical bi-parting doors is 12 inches. This standard is set for safety reasons, ensuring that there is enough space for passengers to safely enter or exit the elevator without the risk of the doors closing prematurely.

In the context of elevator safety, the 12-inch criterion helps to prevent accidents that could occur if a door attempted to close while someone is still in the threshold area. This distance allows enough room for individuals to make their way safely in and out of the elevator, emphasizing the importance of clearances in door operation systems to enhance user safety and comfort.

Understanding this standard is crucial for anyone involved in elevator safety inspections, installation, or maintenance, ensuring compliance with regulations designed to protect users.