On February 20, 2003, a pyrotechnic spark ignited foam insulation on the walls of The Station nightclub in West Warwick, Rhode Island. Within 90 seconds, the fire had spread across the entire stage and ceiling area. Within five and a half minutes, the building was fully engulfed. Of the 462 people inside, 100 died — most near the front entrance, which became the focal point of a panicked crowd attempting to exit through the same door they had entered (Grosshandler et al., 2005).

The investigation that followed identified multiple contributing factors, but among the most significant was the inadequacy of the means of egress for the number of people present. The nightclub had multiple exits, but many patrons were unaware of them and tried to escape through the main entrance. The result was a fatal bottleneck at a single point in a building with more than enough total exit capacity — if that capacity had been used.

The means of egress is the most critical life safety system in any assembly occupancy. Understanding what it requires, how it is designed, and how to verify that it is functioning properly is one of the most important responsibilities of any event organizer.

The Three-Part Means of Egress System

NFPA 101, Life Safety Code, defines the means of egress as a continuous and unobstructed path of travel from any occupied portion of a building or structure to a public way (National Fire Protection Association [NFPA], 2021). This path has three distinct parts, each with its own requirements:

• Exit access: the portion of the path from the occupied area to the exit. Includes aisles, corridors, and passageways within the event space. Exit access areas are typically not separated from the occupied space by fire-rated construction.
• Exit: the protected portion of the path, separated from the occupied space by fire-resistance-rated construction and opening protectives. Exit enclosures protect occupants from fire and smoke while they travel toward safety.
• Exit discharge: the portion from the end of the exit to the public way. Must be clear, illuminated, and free of obstructions that could slow evacuation.

All three parts must be operational, unobstructed, and properly maintained at all times the venue is occupied. A failure in any one part breaks the continuous path and compromises the entire system (NFPA, 2021; International Code Council [ICC], 2021a).

Exit Width and Number Requirements

The aggregate width of exits must be sufficient for the occupant load of the space. NFPA 101 calculates required exit width based on the occupant load and the flow rate of people through the exit per unit of time. The minimum width for any individual exit is 32 inches (813 mm) clear — in practice, most codes require a minimum of 36 inches for assembly occupancies (NFPA, 2021).

The number of exits required depends on the occupant load:

• Occupant load of 1–500: minimum two exits
• Occupant load of 501–1,000: minimum three exits
• Occupant load above 1,000: minimum four exits (NFPA, 2021)

Exits must be distributed so that the failure of any single exit — whether blocked by fire, equipment, or a crowd surge — does not prevent evacuation. NFPA 101 requires that exits be arranged so that occupants can turn away from any point of fire origin and find an alternative exit route. Exit access travel distance — the maximum distance a person should have to travel from any point in the venue to reach an exit — is limited by code and varies by occupancy type and whether the building is sprinklered (NFPA, 2021).

Exit Doors and Hardware

Exit doors in assembly occupancies with occupant loads exceeding 100 persons must be equipped with panic hardware — a device that releases the door latch when a horizontal force is applied from the direction of egress, without requiring the person to grasp or turn a handle (ICC, 2021a; NFPA, 2021). Panic hardware that is taped, tied, or otherwise disabled is one of the most commonly cited fire code violations at live event venues.

Exit doors must swing in the direction of egress travel — outward — for assembly occupancies with occupant loads above 50. They must not open across the means of egress in a way that reduces its required width. Self-closing fire doors that protect exit enclosures must not be propped open; they are designed and rated to slow or prevent the passage of fire and smoke into the exit stairwell or corridor (ICC, 2021a).

Security fastenings such as padlocks and chains must never be used on exit doors when the venue is occupied. This prohibition traces directly to historical disasters and is among the clearest and most consistently enforced requirements in fire code (NFPA, 2021).

Stairways

Stairways used as part of a means of egress must have a minimum width of 44 inches (1,118 mm) for assembly occupancies — or 36 inches (914 mm) where the occupant load served is fewer than 50 people. Stairways wider than approximately six feet (1.8 m) should be divided by handrails into sections no narrower than 36 inches each. Minimum headroom clearance is 80 inches (2,032 mm). Risers and treads must be uniform throughout any flight of stairs (NFPA, 2021; ICC, 2021a).

The aggregate capacity of stairways must account for the possibility that one stairway may be inaccessible due to fire or smoke. The remaining stairways must be sufficient to evacuate the full occupant load of the affected floors. Elevators, escalators, and moving walks may not be used as part of a required means of egress (NFPA, 2021).

Ramps and Accessible Egress

Where ramps are used as part of a means of egress, the maximum running slope is 1:12 (8.3 percent). Ramps with a rise greater than six inches (152 mm) must have handrails on both sides. The minimum clear width between handrails is 36 inches (914 mm). Each ramp surface must be slip-resistant and securely attached. Landings must be at least as wide as the ramp and a minimum of 60 inches (1,524 mm) long at the top and bottom of each run and at any turning points (ICC, 2021a).

The Americans with Disabilities Act Standards for Accessible Design (2010 ADA Standards) and NFPA 101 both require that accessible means of egress be provided for people who cannot use stairways. This typically includes accessible routes to exit discharge, areas of refuge at stairway landings with two-way communication, and procedures for assisted evacuation (NFPA, 2021; ADA National Network, 2010). Organizers must plan for the evacuation of people with disabilities and confirm that their event’s evacuation plan addresses this requirement explicitly.

Indoor Venues

Indoor venues designed for public assembly and holding a current certificate of occupancy will typically have an approved means of egress for their normal configuration. However, any modification to that configuration — adding a stage, installing temporary seating, using the floor area for standing-room rather than fixed seating, or increasing the planned occupant load — may require review and approval by the local building and fire authorities (NFPA, 2021; ICC, 2021a).

Buildings not designed for public assembly — warehouses, industrial buildings, aircraft hangars, converted retail spaces — almost certainly do not have adequate means of egress for entertainment events. The required number and width of exits for a warehouse storing goods is a fraction of what would be required for a standing-room crowd of the same number of people. Organizers who plan to use non-traditional venues must work with the local AHJ early in the planning process to identify required modifications (FEMA, 2010).

Sports Stadiums

Sports stadiums with valid occupancy permits typically have adequate means of egress for their normal spectator configurations. However, if the playing field or infield area will be used for audience occupancy — as it commonly is at large concerts — additional means of egress may be required for that area. Temporary stages, structures, and seating sections added within the venue create new occupant loads that may not have been accounted for in the original egress design (ICC, 2021a).

The U.S. Department of Justice’s ADA Accessibility Guidelines for stadiums require that accessible seating and accessible routes be provided and maintained. These requirements apply to both permanent configurations and event-specific configurations (ADA National Network, 2010).

Outdoor Venues

Outdoor venues are generally subject to the same occupant load principles as indoor venues. The local fire and building authorities having jurisdiction will determine and must approve the maximum occupant load for the specific configuration of the site. This number is not simply computed from square footage — it reflects the number of people who can safely reach the public way within the required time given the available exit paths, their widths, and the distance to be traveled (ICC, 2021a).

For fenced outdoor events, the perimeter fence is effectively the exit enclosure. The gates and openings must be sufficient in number and width, staffed by event personnel throughout the event, and clearly marked. NFPA 101 requires that exits and gateways be unlocked and staffed during the event, and that all exits and gateways be clearly marked with illuminated signs where necessary (NFPA, 2021).

Organizers of outdoor events should also evaluate the risk of wildfires or controlled burns in the area and determine whether wind conditions or seasonal drought risk elevates the fire threat at or near the site. Any elevation in fire risk should be discussed with the local fire authority before the event, and the fire safety plan should be revised accordingly (FEMA, 2010).

Keeping Egress Clear: The Operational Challenge

Designing and building an adequate means of egress is only half the challenge. Maintaining it during event operations — across load-in, the event itself, and load-out — is where compliance most often fails. Equipment flight cases, cable runs, staging carts, and excess inventory routinely appear in aisles and exit corridors. Staff who know the venue may not recognize that an aisle is also a designated exit access route.

NFPA 101 is unambiguous: “the means of egress shall be maintained in accordance with this Code” at all times the space is occupied (NFPA, 2021, Section 7.1.10). Marking exit access aisles with brightly colored tape or paint — a low-cost and highly visible reminder — is a widely used practical measure. Assigning a member of the event safety team to walk the entire means of egress before doors open and at regular intervals during the event is a recommended practice supported by FEMA’s special events guidance (FEMA, 2010).

References

ADA National Network. (2010). ADA standards for accessible design. U.S. Department of Justice. https://www.ada.gov

Federal Emergency Management Agency. (2010). Special events contingency planning job aids manual. U.S. Department of Homeland Security.

Grosshandler, W. L., Bryner, N., Madrzykowski, D., & Kuntz, K. (2005). Report of the technical investigation of The Station nightclub fire (NIST NCSTAR 2). National Institute of Standards and Technology.

International Code Council. (2021a). International fire code. ICC.

International Code Council. (2021b). International building code. ICC.

National Fire Protection Association. (2021). NFPA 101: Life safety code. NFPA.