Standard fire safety provisions address general hazards. But live events routinely involve conditions that fall outside the normal operating assumptions of a business office or retail store: welding and cutting during load-in, propane-powered cooking equipment in close proximity to audiences, fuel storage for generators, pyrotechnic and flame effects used as production elements, and large tent or membrane structures as primary audience spaces. Each of these represents a fire risk that is specific, elevated, and governed by code requirements beyond the baseline.

Recognizing and addressing these special risks before the event opens is not optional. Failure to do so has produced some of the most catastrophic fire-related incidents in live event history.

Hot Work: Welding, Cutting, and Grinding

Hot work is any operation involving open flames, heat, or the generation of sparks — including welding, torch cutting, grinding, brazing, soldering, and the use of heat guns. Hot work is common during event load-in, when structural modifications, custom rigging fabrication, and set construction may require metalworking. It is also one of the most significant causes of fire in temporary event settings, because the sparks and molten metal produced by hot work can travel significant distances and ignite combustible materials that are not immediately visible to the worker performing the operation (National Fire Protection Association [NFPA], 2021a; International Code Council [ICC], 2021a).

Minimum required measures for hot work at events include:

• A minimum of one 2-A:20-B:C portable fire extinguisher must be immediately accessible within 30 feet (9.1 m) of any hot work operation before work begins
• A fire watch must be established and maintained for the entire duration of hot work operations and for a minimum of 30 minutes after work ends. The fire watch must be performed by a person with no other duties — dedicated to observing for fire, not supervising the work or performing other tasks
• All combustible materials within 35 feet (10.7 m) of the work area must be moved, protected with fire-resistant covers, or wet down before hot work begins
• Hot work should not be performed in areas where flammable vapors are present (near fuel storage, near propane cooking equipment, or where flammable cleaning solvents have been recently used) (NFPA, 2021a; ICC, 2021a)

Many jurisdictions and venues require a written hot work permit for any hot work on the premises. The permit documents the specific location and duration of the work, the fire watch arrangement, and the measures taken to protect adjacent combustibles. Even where not required, a hot work permit is a recommended practice that provides accountability and a written record (NFPA, 2021a).

Fuel Storage: Generators and Vehicles

Portable generators are standard infrastructure at outdoor events and at events in venues without sufficient utility power. They burn diesel or gasoline — combustible or flammable liquids — and produce hot exhaust that can ignite materials in contact with or near the exhaust path. Specific code requirements for fuel and generator management include:

• Portable fire extinguishers with a minimum rating of 2-A:20-B:C must be located within 75 feet (22.9 m) of fuel dispensing or storage locations and within 50 feet (15.2 m) of generators
• Fuel storage must be separated from generator exhaust, open flames, smoking areas, and any source of ignition
• Fuel should be stored in approved containers away from public access areas
• Generator exhaust must be directed away from occupied areas and combustible materials — exhaust that re-enters tents or enclosed spaces is both a fire hazard and a carbon monoxide hazard (ICC, 2021a; NFPA, 2022a)

Diesel is preferable to gasoline for portable generators at events. Diesel has a flash point above 100°F (38°C), meaning it will not produce flammable vapors at ambient temperatures. Gasoline has a flash point of approximately -45°F (-43°C) and produces flammable vapors at all practical ambient temperatures — a significant elevation in fire risk, particularly in warm weather (NFPA, 2022a).

Smoking and Open Flames Near Tents

The IFC and NFPA 102, Standard for Grandstands, Folding and Telescopic Seating, Tents, and Membrane Structures, both prohibit smoking, open flames, and any device emanating flame or fire inside or within 20 feet (6.1 m) of any tent or membrane structure when the structure is open to the public — unless specifically authorized in writing by the AHJ (NFPA, 2022c; ICC, 2021a).

This prohibition applies to:

• Cigarettes and e-cigarettes
• Open flame cooking equipment (unless authorized and positioned per code)
• Charcoal grills and cooking devices
• Propane heaters not specifically approved for tent use
• Candles and decorative lighting with open flames
• Any flame-producing special effect inside or near the tent

Obtaining written authorization from the AHJ for approved exceptions — such as gas cooking equipment in a catering tent — requires advance planning and should be part of the permit application process, not a day-of request (ICC, 2021a).

Pyrotechnics and Flame Effects

The Station nightclub fire of 2003 was ignited by a pyrotechnic display used as a concert production element. The pyrotechnic sparks — designed and tested for outdoor use — ignited acoustical foam that had been installed on the stage walls without flame resistance testing. Within 90 seconds, the fire had spread to the ceiling. Within five and a half minutes, the building was fully engulfed (Grosshandler et al., 2005).

The regulatory framework governing pyrotechnics and flame effects at live events is extensive and, following the Station fire, has been significantly reinforced. NFPA 160, Standard for the Use of Flame Effects Before an Audience, governs the use of flame effects — any device that produces a controlled flame as a production element in the presence of an audience (NFPA, 2021b). Key requirements include:

• Flame effects must be operated only by a licensed or certified operator trained in the specific devices to be used
• A detailed safety plan must be developed before use, identifying the specific effects, their locations relative to audience and combustible materials, the weather and ventilation conditions required, and emergency shutdown procedures
• All materials within the reach of the flame effect — including surface treatments on walls and ceilings — must be verified to be non-combustible, limited-combustible, or tested and approved as flame-resistant
• The local fire authority must be notified in advance and may require a permit and on-site fire department presence
• A designated fire safety officer must be present during all flame effect operations with authority to halt any effect and initiate emergency procedures

For consumer-grade pyrotechnics used in indoor or covered environments, the IFC requires specific permits, setback distances from the audience and from any combustible material, and weather (no-wind) conditions that may preclude outdoor use (ICC, 2021a). Any outdoor pyrotechnic display requires compliance with NFPA 1124, Code for the Manufacture, Transportation, Distribution, and Sale of Fireworks and Pyrotechnic Articles, and local permits from both the fire authority and, in many jurisdictions, law enforcement.

Tents, Grandstands, and Bleachers

Temporary structures — tents, membrane structures, grandstands, bleachers, and portable stages — have specific fire safety requirements in NFPA 102 and the IFC. Key requirements include:

• All tent fabrics must meet the flame propagation performance criteria of NFPA 701 before a permit to erect will be issued. Vendors should provide current flame test certification for all tent materials (NFPA, 2022c; ICC, 2021a).
• Guy lines and support cables must not cross any means of egress at a height of less than 8 feet (2.4 m)
• Portable fire extinguishers must be provided in every tent and membrane structure
• Exit widths and numbers for tent structures are calculated using the same occupant load principles that apply to permanent buildings
• Grandstands and bleachers must comply with NFPA 102 for exit capacity, aisle width, row spacing, and structural requirements (NFPA, 2022c)

Elevated Fire-Fighting Equipment Locations

Live events routinely involve personnel working at elevated positions: in occupied truss structures, on catwalks, at followspot platforms, and in lighting positions above the audience. Portable fire extinguishers must be available at each of these locations — positioned so that a person at the elevated work area can access a fire extinguisher without descending to the floor level (NFPA, 2022a).

Any extinguisher installed at an elevated position must be secured with a safety cable in addition to its mounting bracket. An unsecured extinguisher at a truss position is a potential projectile hazard: even a small jolt during a truss movement could dislodge an unmounted extinguisher and send it falling into a crowd below. Cable lanyard retention is not optional for overhead extinguisher installations (NFPA, 2022a).

References

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.

National Fire Protection Association. (2021a). NFPA 51B: Standard for fire prevention during welding, cutting, and other hot work. NFPA.

National Fire Protection Association. (2021b). NFPA 160: Standard for the use of flame effects before an audience. NFPA.

National Fire Protection Association. (2022a). NFPA 10: Standard for portable fire extinguishers. NFPA.

National Fire Protection Association. (2022c). NFPA 102: Standard for grandstands, folding and telescopic seating, tents, and membrane structures. NFPA.