The maximum pressure required to trigger the audible alarm on delayed egress locks is:

The maximum pressure required to trigger the audible alarm on delayed egress locks is:

• A. 12lbs
• B. 15lbs
• C. 20lbs
• D. 25lbs

Answer: (B)

Delayed egress locks are designed so that exiting requires a deliberate action rather than just brushing the door, and the audible alarm is tied to how hard the door is pressed. The standard sets a maximum threshold of fifteen pounds of force on the door (or push bar) to trigger the audible alarm. This keeps nuisance alarms from minor contact or casual leaning, while ensuring a clear alert if someone attempts to force the lock open. In practice, if the door is pressed with fifteen pounds or more, the alarm should sound, which is why fifteen pounds is the correct threshold. Values lower than that would make the system too sensitive, and higher values would risk delaying egress or weakening the alarm’s deterrent effect.

Delayed egress locks are designed so that exiting requires a deliberate action rather than just brushing the door, and the audible alarm is tied to how hard the door is pressed. The standard sets a maximum threshold of fifteen pounds of force on the door (or push bar) to trigger the audible alarm. This keeps nuisance alarms from minor contact or casual leaning, while ensuring a clear alert if someone attempts to force the lock open. In practice, if the door is pressed with fifteen pounds or more, the alarm should sound, which is why fifteen pounds is the correct threshold. Values lower than that would make the system too sensitive, and higher values would risk delaying egress or weakening the alarm’s deterrent effect.