In an elevator system, landing doors (also known as Hostway doors) are the stationary doors located at each floor of a building. They act as a critical safety barrier, preventing passengers from accidentally falling into the open elevator shaft when the car is not present at that level
Key Functions and Features
- Safety Interlock: The most vital feature is the door interlock system, which mechanically and electrically prevents a landing door from being opened unless the elevator car is properly aligned with that floor.
- Synchronized Operation: When the elevator arrives, a door clutch on the car door engages with the landing door mechanism, allowing both sets of doors to open and close in perfect coordination.
- Obstruction Detection: Modern landing doors use infrared sensors or light curtains to detect people or objects in the doorway, automatically reversing the doors to prevent injury.
- Fire Resistance: Many landing doors are fire-rated (e.g., 60 to 120 minutes) to help contain smoke and flames during emergencies.