Type of Lock: Some delayed egress locks utilize panic hardware that contains the delayed egress circuitry. A delayed egress mag lock incorporates a switch that activates the timer when the door is moved. Both of these delayed egress locks typically include the audible alarm required by code. Delayed egress controllers are also available, which are listed for use with specific lock products so that a custom system can be created. One example of this would be an exterior gate with a mag lock designed specifically for exterior use and a separate controller to provide the delayed egress functionality. Other components may be required to complete the system.
Code Requirements: A fire alarm or sprinkler system is required in order to use delayed egress locks, and the locks must allow immediate egress (no delay) upon activation of those systems and upon power failure. Delayed egress locks are not allowed in all occupancy types. For example, the IBC does not allow delayed egress locks on assembly, educational or high hazard occupancies, while NFPA 101’s requirements vary by occupancy classification. Both of these codes allow delayed egress locks to be used in healthcare facilities. In addition to the activation requirements listed above, other conditions for the use of delayed egress locks include signage, an audible local alarm, capability of remote release, limitations on the number of delays in an egress route and emergency lighting at the door. The 2015 IBC has added a requirement for the delayed egress locking system to be listed in accordance with UL 294 – Access Control System Units.
Common Code Pitfalls: It is fairly common to see delayed egress locks installed on doors without the proper signage. The verbiage for these signs usually is “Push until alarms sounds. Door can be opened in 15 [30] seconds.” It’s very important to check the specific requirements of the applicable occupancy type to ensure that the devices operate as required by code. Delayed egress locks must be tested annually in accordance with NFPA 72 – The National Fire Alarm and Signaling Code.
More Information: IBC – 1010.1.9.7 (2015), 1008.1.9.7 (2012); NFPA 101 – 7.2.1.6.1 (2015 and 2012)
