Delayed egress is a type of door locking system that temporarily prevents an exit door from opening when someone pushes on it, typically for 15 seconds. The door isn’t permanently locked. It simply creates a short delay, during which an alarm sounds, before the door releases and allows the person through. These systems balance two competing needs: keeping people safe inside a building (preventing wandering patients, deterring theft) while still allowing everyone to exit in an emergency.
How a Delayed Egress Door Works
A delayed egress door looks like a normal exit door, usually with a push bar or similar hardware. When you push on the release device, two things happen simultaneously: an alarm sounds near the door, and a countdown timer starts. After the countdown expires (usually 15 seconds), the lock releases and the door opens freely. The process is irreversible once started, meaning staff can’t reset the timer mid-countdown to keep the door locked.
The force required to start this process is minimal. Building codes specify no more than 15 pounds of pressure applied for about 1 to 3 seconds. That’s roughly the effort of pressing a crosswalk button firmly. Once the lock releases, it can only be re-locked manually, so the door stays open until someone actively resets it.
Every delayed egress door must display a sign within 12 inches of the release device. For doors that swing outward, the sign reads: “PUSH UNTIL ALARM SOUNDS. DOOR CAN BE OPENED IN 15 SECONDS.” This tells anyone approaching the door exactly what to expect and what to do.
The 15-Second and 30-Second Delay
The standard maximum delay is 15 seconds. This is short enough that it doesn’t meaningfully slow down someone evacuating during a fire, but long enough to alert staff that someone is trying to leave through a controlled exit. In most cases, the alarm alone is enough to deter casual misuse or prompt a staff member to respond.
In some cases, a local authority (the official responsible for enforcing building codes in that jurisdiction) can approve a longer delay of up to 30 seconds. This exception is not automatic. It requires specific approval and is typically granted only when the building’s use justifies the extra time, such as in certain healthcare settings where patients may need to be redirected for their own safety.
Where Delayed Egress Systems Are Used
Delayed egress doors show up most often in two types of settings: healthcare facilities and retail stores.
In healthcare, these systems help prevent what’s called “elopement,” when a patient leaves a facility without authorization in a way that puts them at risk. Memory care units for people with Alzheimer’s or dementia are a common example. A patient may not understand where they are or where they’re going, and a brief delay at the door gives staff time to intervene. Psychiatric units use similar systems. The Joint Commission, which accredits healthcare facilities in the U.S., recognizes delayed egress as one of the approved methods for securing doors in these settings.
In retail, the motivation is theft prevention. A delayed egress door at a stockroom exit or a back entrance creates just enough friction to discourage someone from walking out with merchandise, while the alarm draws immediate attention.
Nursing homes, schools, and daycare facilities may also use these systems in specific circumstances, though the rules vary by building type and local codes.
Emergency Overrides and Fire Safety
The most important feature of any delayed egress system is that it cannot trap people during a real emergency. Every delayed egress lock must be connected to the building’s fire alarm system. When a fire alarm activates anywhere in the building, all delayed egress doors unlock immediately. There is no countdown, no waiting. The door opens the moment you push it.
The same immediate release happens if the building loses power. These systems are designed so that any failure defaults to unlocked. The underlying principle in fire and life safety codes is straightforward: no locking device, even in the event of a malfunction, can prevent someone from using an exit during an emergency.
This fire alarm integration is what separates delayed egress from a simple locked door. A locked door requires a key or special knowledge to open. Delayed egress doors require only patience (15 seconds) under normal conditions and nothing at all during an alarm. Building codes explicitly prohibit exit doors that need keys, tools, or any special knowledge to operate from the inside.
Components of a Delayed Egress System
A complete delayed egress setup includes several parts working together:
- Magnetic lock: An electromagnet that holds the door closed during the delay period.
- Exit sensor: Detects when someone applies pressure to the door hardware and starts the countdown.
- Countdown timer: Tracks the 15- or 30-second delay and releases the magnetic lock when time expires.
- Local alarm: A sounder near the door that activates immediately when the timer starts, alerting nearby staff.
- Signage: The required instructional sign telling users what will happen when they push the door.
- Fire alarm interface: The connection that bypasses the entire delay when the fire alarm system activates.
Delayed Egress vs. Locked Doors
Delayed egress is not the same as locking an exit. In settings like psychiatric units, Alzheimer’s care floors, or dementia units, facilities sometimes use door locking arrangements that go beyond delayed egress. These doors may remain fully locked and require staff to unlock them. This is only permitted when the clinical needs of patients require it, and only if staff can unlock the doors readily at all times.
The key distinction is control. A delayed egress door will always open on its own after the timer runs out, no staff intervention required. A locked door without delayed egress depends entirely on staff being available to open it. Both approaches are recognized by building and healthcare codes, but they serve different situations and come with different requirements for staffing and safety planning.