Aircraft Hangar Fire Protection Calculator

Calculate aircraft hangar fire protection requirements including foam system design per NFPA 409.

Input Parameters

Results

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Foam Solution Application Rate
gpm
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Foam Concentrate Required
gallons
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Overhead Sprinkler Density
gpm/ft²
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Minimum System Duration
min
Note: NFPA 409 classifies hangars into Groups I-IV based on door height and aircraft size. Group I and II require foam-water deluge plus overhead sprinklers. Low-level AFFF is preferred. Supplemental ARFF hand lines and monitors may be required. Coordinate with NFPA 11 for foam system design.

Reference

NFPA 409 Aircraft Hangar Fire Protection: Foam Flow = Design Area * Application Rate Group I: 0.16 gpm/ft² AFFF, design area = max(aircraft area, 75% hangar) Group II: 0.16 gpm/ft², design area = max(aircraft area, 50% hangar) Foam Concentrate (3% AFFF) = Total Solution * 0.03 Duration: 10 min minimum (Groups I-III) Overhead sprinklers: 0.17-0.20 gpm/ft²