From the September/October 2011 issue of NFPA Journal®
By Chip Carson, P.E.
It’s not unusual for elevator lobbies to become security buffer zones. For example, the doors from the elevator lobby may be secured, requiring the use of a card swipe or cipher lock to enter the floor. If you don’t have your access card or don’t know the access code, this creates a locked elevator lobby from which the only way out is the elevator. This could potentially trap occupants in the elevator lobby, especially if the elevators are returned to the ground floor under Phase I emergency elevator operation.