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Maintain fire and life safety in tunnels and bridges according to the latest requirements in the 2008 NFPA 502.

NFPA 502: Standard for Road Tunnels, Bridges, and Other Limited Access Highways provides designers, AHJs, and state and federal regulators with guidelines for the construction, operation, maintenance, and fire protection of limited-access highways, tunnels, bridges, elevated highways, and air right structures.

The revised 2008 Standard reflects the latest industry developments and includes these important changes:

  • New material discussing the issues on fixed fire suppression systems
  • New and more restrictive design fire curves for structural component fire resistance
  • New material for determining the tenability of the tunnel environment for egress
  • Revised fire data for typical vehicle fires based on international research.
  • New information on unregulated cargoes
  • New categories for tunnels and material for determining the classification

 

Document History

  1. NFPA (Fire) 502


    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2023 Edition

    • Most Recent
  2. NFPA (Fire) 502


    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2020 Edition

    • Historical Version
  3. NFPA (Fire) 502


    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2017 Edition

    • Historical Version
  4. NFPA (Fire) 502


    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2014 Edition

    • Historical Version
  5. NFPA (Fire) 502


    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2011 Edition

    • Historical Version
  6. NFPA (Fire) 502

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    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2008 Edition

    • Historical Version
  7. NFPA (Fire) 502


    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2004 Edition

    • Historical Version
  8. NFPA (Fire) 502


    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 2001 Edition

    • Historical Version
  9. NFPA (Fire) 502


    Standard for Road Tunnels, Bridges, and Other Limited Access Highways, 1998 Edition

    • Historical Version