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Safety Considerations for Motorized Commercial and Industrial Doors
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| May 22, 2014 |
Large commercial doors have special safety considerations that should be taken into account as a part of the overall door safety system. A qualified professional door installation company can provide you with the peace of mind you need to assure your motorized industrial door system is safe and in good working order.
What is a Sensing Edge?
A sensing edge attaches to the leading edge of the door. Typically it replaces the weather seal. When activated, it sends a signal to the motor to stop or reverse the door’s motion.
There are several types of activation methods commonly used in the construction of a Sensing Edge:
- Pneumatic/Air Activated
Typically contain a flexible hose that is sealed on one end and connected to an air switch on the opposite end. When the hose is compressed air is pushed into the switch, which then sends a signal to the motor - Electrically Activated
Contains two conductive strips, separated by a gap. When the sensor is compressed the conductive elements touch each other. Touching of these conductive strips sends an electric signal to the motor. - Photo Optic
Contains two photo eyes attached to the door. One photo eye sends out an invisible beam of light to the other receiving eye. When the beam of light is blocked, a signal is sent to the motor.
Safety Standards and Codes for Motorized Commercial and Industrial Doors
Effective August 29, 2010, Underwriters Laboratories required that all commercial door operators bearing the UL label are required to be installed with a continuously monitored safety device. This may be accomplished by continuous pressure on the close button or by use of a monitored reversing device attached to the door system.
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