The Texas Airports Council would like to inform our members and sponsors that the 2026 edition of NFPA 409: Standard on Aircraft Hangars has been released, introducing several important updates that will influence hangar design, construction, and fire protection requirements across the aviation industry.

The revised standard provides greater clarity, flexibility, and cost efficiency for general aviation hangar owners and operators while maintaining a strong emphasis on safety. These updates reflect years of industry input and align the standard with current operational practices and aircraft design considerations.

Key Changes in the 2026 Edition

• Increased Door Height for Group II Hangars: The minimum aircraft access door height has been raised to 35 feet, addressing modern aircraft dimensions and reducing unnecessary design constraints.
• Elimination of Column Sprinklers: Column sprinkler requirements have been removed in cases where a foam fire suppression system is not required, reducing installation complexity and cost.
• Reinstated Hangar Cluster Criteria: “Hangar cluster” separation provisions for Group III hangars have been restored, offering additional flexibility in site planning and layout.
• Clarified Definition of Hazardous Operations: The standard now defines hazardous operations as activities that “when performed, lead to an increased likelihood of causing a fuel spill fire,” with expanded explanatory guidance provided in the Annex.

These updates may influence local code adoption, hangar development planning, and compliance considerations for airport sponsors and operators. TAC encourages all members, airport managers, consultants, and stakeholders to review the 2026 edition to ensure alignment with evolving fire protection and design requirements.