You know the old saying when it rains, it pours. The last couple of months it has been raining delayed egress locks around here. Delayed egress locks are basically locks that delay a person from exiting a building for 15-30 seconds.
Examples of where delayed egress locks are used:
– Hospitals – The egress locks can be interfaced to wireless sensors worn by newborn children so that all exits will lock if a baby is stolen from a hospital room.
– Retail establishments to deter shoplifting.
– Airports or other controlled areas where people are held until they clear customs or quarantine stations.
– Assisted living facilities especially where Alzheimer or Dementia patients are held.
– In some schools were troubled or violent children are taught. Often school systems refer to the locks as “Runner Locks”.
Delayed Egress Requirements
Although it depends on the local Authority Having Jurisdiction; the basic rules involving these type of locks are:
1. Upon the application of not more than 15 lbs of pressure the door will enter into an irreversible process which allows egress for not more than 15 seconds.
2. Can only have one delay in the path of egress; we cannot have one at the room and also at the exit.
3. There must be an audible signal near the door and proper signage.
4. The lock must be tied to the fire alarm so if the fire alarm is activated the delayed egress lock allows immediate egress.
5. Alarm must be reset manually with either a key pad or key switch.
6. Upon loss of power, the locks must release immediately and allow free egress.
7. Some Authorities Having Jurisdiction will allow a 30 second delay. In most of the hardware systems this is field adjustable.
Below is a picture of a baby’s foot with a exit door control transmitter.
Hospital Maternity Security:
If the baby is removed from this section of the hospital; this device sends a signal to all the exit doors to enter into the locked state. Attempts to remove the transmitter locks all exit doors; and if the transmitter falls out (as shown here) an alarm sounds. The exits only relock when the alarm is reset.
Debbie Purcell, AHC