Printed from the blog of Lori Greene, AHC/CDC, CCPR, FDAI
Ingersoll Rand Security Technologies
Email: lori_greene@allegion.com, Blog: www.idighardware.com or www.ihatehardware.com


Nov 11 2011

Decoded: Delayed Egress Hardware – Code Comparison (January 2012)

Category: DHI,Egress,Electrified HardwareLori @ 1:30 am Comments (7)
Share

This post was printed in the January 2012 issue of Doors & Hardware

[Click here to download the reprint of this article.]

Delayed egress hardware prevents a door from being opened from the egress side, usually for a period of 15 seconds. This type of device is often used to prevent theft, while maintaining life safety. The system is most commonly comprised of an exit device incorporating delayed egress features, or an electromagnetic lock and power supply, one of which would contain delayed egress circuitry. When the device is actuated, the door remains locked on the egress side for 15 seconds, and then releases to allow egress.

Before specifying or supplying delayed egress hardware, you must verify that it is allowed to be used in the applicable occupancy classification, and be aware of the other code requirements that pertain to the use of this product. The requirements vary depending on whether you are referring to the International Building Code (IBC) or NFPA 101 – The Life Safety Code. There may be additional local requirements as well.

NFPA 101 allows the use of delayed egress hardware on all occupancy types (low or ordinary hazard), with some conditions that must be met if it is used (see Table 2). Conversely, the IBC does not allow the use of delayed egress hardware on doors serving Assembly, Educational, or High Hazard occupancies. This means that for jurisdictions enforcing the IBC, delayed egress hardware would not be allowed in schools or in Assembly occupancies like libraries, which would otherwise be prime locations for this type of hardware. In this case a local alarm could be used to deter use of the door, but no delay would be allowed by code. A variance may be granted for certain types of Assembly occupancies such as museums, but the process for obtaining the variance must be followed and documented.

Refer to the following tables for the requirements pertaining to delayed egress hardware, and note the subtle differences between codes. When specifying or supplying delayed egress hardware, verify which code and edition are to be used and the occupancy classification of the project, then apply the appropriate requirements to ensure that your installation is code-compliant.

Table 1: Delayed Egress Hardware – Code Comparison
Code: International Building Code NFPA 101
Editions: 2003, 2006, 2009, 2012 2003, 2006, 2009
Occupancy Types: Allowed in all occupancies EXCEPT A (Assembly), E (Educational), and (H) High Hazard. Allowed in all occupancies (low and ordinary hazard) with some conditions for use. Refer to Table 2.
Products: Approved, listed, delayed egress locks Approved, listed, delayed egress locks
Alarm System: Building must be protected throughout by an automatic sprinkler system or approved automatic smoke or heat detection system Building must be protected throughout by an approved, supervised, automatic fire detection or sprinkler system
Quantity: Building occupant shall not be required to pass through more than one door equipped with a delayed egress lock before entering an exit. Refer to Table 2.
Initiation: 15-pound force applied for 1 second, irreversible process 15-pound force applied for 3 seconds, irreversible process
Rearm: Device must be rearmed manually. Device must be rearmed manually.
Alarm Release: Doors allow immediate egress (no delay) upon actuation of the automatic sprinkler system or automatic fire detection system. Capability of release from the fire command center. Doors allow immediate egress (no delay) upon actuation of the sprinkler system, not more than one heat detector, or not more than two smoke detectors
Loss of Power: Doors allow immediate egress (no delay) upon loss of power controlling the delayed egress lock Doors allow immediate egress (no delay) upon loss of power controlling the delayed egress lock
Extension of Delay: Up to 30 second delay when approved by AHJ Up to 30 second delay when approved by AHJ
Audible Alarm: Required, in the vicinity of the door Required, in the vicinity of the door
Signage: On the door, above and within 12″ of the release device, “PUSH UNTIL ALARM SOUNDS. DOOR CAN BE OPENED IN 15 [30] SECONDS.” Visible, durable sign on the door leaf adjacent to the release device, with letters 1″ high minimum with 1/8″ minimum stroke width on contrasting background, “PUSH UNTIL ALARM SOUNDS DOOR CAN BE OPENED IN 15 [30] SECONDS.”
Emergency Lighting: Required at the door Required at the door

Table 2: Occupancies Permitting Delayed Egress Locks
NFPA 101 – 2003, 2006, 2009 Editions
Occupancy Condition
Assembly Only doors other than main entrance/exit doors may be equipped with delayed egress locks.
Educational / Day Care No restrictions.
Health Care, Lodging and Rooming Houses, Hotels and Dormitories, Apartment Buildings Not more than one delayed egress device may be encountered in any egress path.
Residential Board and Care Exterior doors only. Not more than one delayed egress device may be encountered in any egress path.
Ambulatory Health Care No restrictions (Editions of NFPA 101 prior to 2003 limit the use of delayed egress devices in ambulatory health care occupancies to exterior doors.)
Mercantile, Business, Industrial, Storage No restrictions.

This post was originally created on November 11, 2011, and was printed in the January 2012 issue of Doors & Hardware magazine.

7 Responses to “Decoded: Delayed Egress Hardware – Code Comparison (January 2012)”

  1. Nolan Thrope says:

    Great info. In New Jersey we can use Delayed Egress on exterior doors in a school. They have been doing it for years. God only knows if they release upon actuation of the fire alarm or smoke detectors.

  2. Brad Keyes says:

    Hi Lori

    Great information. I find delayed egress locks in nearly every hospital that I inspect. Most of them are installed correctly, but frequently I find ignorance where the facility manager allows delayed egress locks without meeting all of the requirements. Sometimes, the building is not 100% protected with automatic sprinklers or fire detection equipment. Sometimes there are multiple delayed egress locks in a path of egress to the public way, and sometimes the required signage is missing.

    On a similar subject, every hospital that I visit has some sort of deficiency with access-control locks, the most common problems being the absence of the required motion sensor on the egress side of the door and the “Push To Exit” button not mounted within 5 feet of the doorway.

    Then, there are the “clinical needs” locks found in section 19.2.2.2.4 in the 2000 edition of the LSC that are also widely abused and misunderstood, but that’s a subject for another day.

  3. Keith Laduzinsky says:

    How does the code apply to an electromagnetic with delayed action such as Schlage Security – Electro Magnetic M490DE. Can I install a M490DE with an mortise lock with request for exit switch.
    How does this relate to Initiation?
    Rearm, do I need key switch at source to rearm?

    • Lori says:

      Hi Keith –

      A delayed egress mag-lock is not required to meet the code requirements of a standard mag-lock. If it was a standard mag-lock you’d need either an RX or a sensor and a push-button, but with delayed egress mag-locks you don’t need those release devices. You just have to comply with the delayed egress requirements. Delayed egress mag-locks are initiated either by a switch built into the mag-lock or an RX switch. You can use any type of switch to rearm, the rearming just has to be manual, not automatic as was allowed by some earlier codes.

  4. Michael Rebbec says:

    Lori –

    Your Table 2 makes it seems as though in E, B, M, F, and S occupancies that you can have multiple delays in a single route of egress. It is my understanding that in any occupancy only 1 delay can be incurred in a path of egress. Is this correct?

    • Lori says:

      Hi Michael –

      In NFPA 101, some occupancy chapters restrict delayed egress devices to one per means of egress, and other occupancy chapters do not include this restriction. So if we were only looking at 101, you could infer that in the occupancy chapters that don’t mention the restriction, delayed egress devices are not limited to one per egress path. However, the IBC limits delayed egress devices to one delay before entering an exit. In my opinion this means that technically you could have one device leading into a stair (“entering an exit”), and another on the stair discharge. But, since NFPA 101 limits delayed egress devices in some occupancy types to one per means of egress, I like that more cautious approach. I think most code officials would prefer one delay per means of egress.

  5. Tom Breese says:

    jumping in late here: California now also has an “L” Laboratory occupancy, and we cannot use delayed egress there, either.

    More California conditions: must have sprinkler *and* smoke detection system, and an illuminated EXIT sign. If sprinkler *or* smoke system are activated, or if loss of power to EXIT sign, delayed egress device/system must disarm. Must have emergency lighting at the door. Must have remote unlock capability by switch in approved location.

    “…building occupant shall not be required to pass through more than one door equipped with a delayed egress lock before entering an exit.” –> I have always seen this interpreted as only one d/egress opening incurred en route to the exit discharge.

    Alzheimer’s and dementia clientele housing permitted to have 30-second delay w/out special request.

    Don’t have latest NFPA 101, don’t know how CA stacks up…

Leave a Reply


one × 8 =