Airport terminals with 40 m ceilings, huge atria and 10,000+ passengers/hour are a challenging smoke control scenario. NFPA 415 (Terminal Buildings) and NFPA 92 apply together. Smoke zoning prevents fire spread between zones.
Smoke Zoning Logic
- Zone size: max 2,000 m2 or 60 m in any dimension
- Smoke curtain: 2-3 m auto-dropping from ceiling
- Each zone: independent exhaust and makeup air
- Check-in, gate, baggage claim: separate zones
Mega Ceiling Calculation
40 m ceiling, 2,000 m2 zone, 5 MW fire:
- NFPA 92 plume: m = 0.071 × 5000^(1/3) × 30^(5/3)
- m = 0.071 × 17.1 × 284 = 345 kg/s
- Volumetric: ~1,000,000 m3/h (single zone)
- AHU cluster: 10 × 100,000 m3/h (redundancy)
- Normal ventilation uses same fans - dual use
NFPA 415 Jet Fuel Risk
- Baggage area: gas cartridge/mini canister in luggage
- Gate area: aircraft refuel min 15 m away
- Jet A/A-1: flash point >38 C - Class II combustible
- Ramp: fuel spill separate drain, oil separator
- Gate monitor: fixed AFFF monitor, 10,000 L/min
Check-in Sprinkler
- High ceiling: ESFR below ceiling + existing rack
- Control joint: OH2, K=8 standard
- Under baggage belt: tunnel sprinkler - OH2, 2 m spacing
- Security X-ray: special water mist or FM-200
Istanbul New Airport Example
- 1.4 million m2, world's largest single-roof terminal
- 250+ smoke zones
- CFD: FDS + Pathfinder, >1 billion cells
- AHJ: joint AECON and ICBO review
- Mega atrium: 40 m facade + 18 m atrium across 7 levels
Terminal smoke with MEP Calc
MEP Calc sizes airport terminal smoke zones, 40 m ceiling plume flow and mega AHU banks per NFPA 415/92.
Download MEP Calc on the App Store
Sources & Further Reading
NFPA 415, NFPA 92, NFPA 409, ICAO Annex 14, ACI Airport Design Guide. NFPA 415 Airport Terminal standard.