Type of Lock: To meet the NFPA 101 requirements, a fail-safe electrified lock is used – either an electromagnetic lock or a fail-safe lever handle on the elevator lobby side.
Code Requirements: Electric locking of elevator lobby doors is only permitted where allowed by the occupancy chapters and where the building has an automatic sprinkler system or a fire alarm system. The lock must unlock automatically upon loss of power to the lock and upon actuation of the sprinkler system or fire alarm system (except when the system is initiated by a manual fire alarm box). When the lock is unlocked, the doors must remain unlocked until the fire alarm system has been manually reset. If the locking hardware has a latch, there must be code-compliant hardware on the door leaf to release the latch. Locking systems used on elevator lobby doors must be listed in accordance with UL 294, and a two-way communication system must be installed in the elevator lobby to allow a building occupant to call for help.
Common Code Pitfalls: Because the IBC doesn’t include a section specifically addressing locks on elevator lobby doors, it’s important to research any local code requirements to see if a modification has been adopted. These modifications can vary from one jurisdiction to the next. Some require a phone in the elevator lobby connected to a location in the building that is staffed 24/7. Other modifications may limit the use of these locks to specific occupancy types or may require hardware that unlocks but does not unlatch, or a fire alarm pull station with signage.
More Information: IBC – 3006.4 (2015), 713.14.1 (2012); NFPA 101 – 7.2.1.6.3 (2015 and 2012)
