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
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SprinkCalc covers hazard classification, design density and area, K-factor selection, water demand and hydraulic calculations for NFPA 13, FM Global and BS EN 12845 in a single iOS app, and exports a professional PDF report. One of the few tools that unifies all three major fire protection standards.
Download SprinkCalc on the App StoreNFPA 415, NFPA 92, NFPA 409, ICAO Annex 14, ACI Airport Design Guide. NFPA 415 Airport Terminal standard.