This post will be published in the April 2016 issue of Doors & Hardware
A few years ago, I worked as the hardware consultant on a data center project with extremely high security. On the interior door openings, there were many challenges and conflicts between the code requirements which mandated free egress and the need for security methods that included interlocks, delayed egress, and several levels of access control.
A security fence surrounded the building, with access control readers at the vehicular and pedestrian entrances to the site. In order to maintain this secure perimeter, the security consultant did not want to allow free egress through the gates which led to the public way. Because the paths from the building’s exterior doors to the public way are part of the means of egress (this portion is called the exit discharge), any gates encountered before reaching the public way would typically be required to comply with the egress code requirements. These include the mandates for one operation to release the latch(es), no special knowledge or effort, no tight grasping/pinching/twisting, and operable hardware mounted between 34 and 48 inches above the floor or ground.
Exterior gates are notoriously difficult to secure while providing free egress when required by the model codes. Locking / latching hardware may be defeated from the secure side of the gate, and many gate designs cannot easily accommodate the door closers needed to keep the gates closed and latched. Electrified hardware used on exterior gates can create additional challenges, due to exposure to the weather as well as unauthorized access to the release devices (like actuating the motion-sensor release for an electromagnetic lock from the secure side of the gate).
With today’s focus on security for schools, office buildings, and other types of facilities, it will likely become more common to see a building completely surrounded by a fence. Each opening in the fence that is equipped with hardware allowing free egress becomes a potential access point – for authorized or unauthorized individuals. While I am not recommending that we surround every building with a fence, or that there should be no gates to provide egress from the contained area, the International Building Code (IBC) does address this situation.
In the 2015 edition of the IBC, this is covered in section 1028.5 – Access to a Public Way, which requires the exit discharge to provide direct and unobstructed access to a public way; typically the public way is a street or alley. The exception to this section states that when access to a public way can’t be provided, a safe dispersal area is required, where building occupants can wait for fire department assistance. This safe dispersal area – a location within the fenced area or enclosed court – must meet the following requirements:
- The safe dispersal area must be large enough to provide at least 5 square feet of space for each building occupant (see below for variations on this requirement for stadiums and I-2 occupancies).
- The area must be on the same lot and at least 50 feet away from the building, accessed by a safe and unobstructed path.
- The area must be permanently maintained and identified as a safe dispersal area, and cannot be used for another purpose such as parking, storage, or temporary structures.
If these criteria are met, the fence surrounding the building would not be required to have gates that allow free egress, as the building occupants can gather safely in the enclosed area and wait for emergency responders to arrive.
For stadiums, IBC-2015 section 1010.2.1 describes a safe dispersal area that provides at least 3 square feet per occupant, located a minimum of 50 feet from the enclosed area of the stadium. If this safe dispersal area is provided, and if the stadium gates are under constant supervision when the stadium is occupied by the public, then panic hardware is not required to be installed on the stadium gates.
Section 407.9 of the 2015 IBC addresses Group I-2 occupancies (hospitals, nursing homes, psychiatric hospitals, detox facilities, and foster care facilities). This section requires the safe dispersal area for I-2 occupancies to provide at least 30 net square feet for each bed and stretcher care recipient and 6 net square feet for ambulatory care recipients and other building occupants; as with other occupancy types, the safe dispersal area must be at least 50 feet away from the building. The use of a fenced area that is sufficiently sized for use as a safe dispersal area can be especially helpful for memory care units and other mental health facilities, where a secured yard is often provided for the use of care recipients. In an emergency, this enclosure can provide a safe alternative to allowing care recipients to freely evacuate to a public way.
NFPA 101 – The Life Safety Code, includes some language similar to the IBC, but only in relation to Detention and Correctional occupancies. In these facilities, sections 22.2.7 (new) and 23.2.7 (existing) allow exits to discharge into an enclosed court. Not more than two walls of the courtyard may be walls of the building, and the enclosed court must be large enough to provide a net area of 15 square feet per person at least 50 feet from the building.
The local codes and the Authority Having Jurisdiction (AHJ) should be consulted to verify the requirements of a specific jurisdiction. For sites where the requirements for a safe dispersal area cannot be met, gates which are properly sized, remotely located, and equipped with hardware that meets the egress requirements will likely be needed.
Photo: Sylvie Bouchard/Shutterstock.com