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Codes and standards published by NFPA are displayed as read-only under license from NFPA solely for use within this system. NFPA material may not be downloaded, printed, reproduced, or transferred.

Investigate origin and cause with greater accuracy using the 2014 NFPA 921.

If your job involves investigating fires and explosions, then you need NFPA 921: Guide For Fire & Explosion Investigations. This document is the premier source for rendering accurate opinions on origin and cause investigations along with incident responsibility and prevention.

The NFPA 921 describes in detail the scientific method to apply in fire and explosion investigations. Public and private professionals have long seen NFPA 921 as a valuable resource in the field and in training. It's also becoming increasingly relevant in U.S. federal and state courts, where the document is used to evaluate the reliability of fire investigations in both civil and criminal trials. Complying with NFPA 921 can bolster a fire investigator's opinion; not complying may result in being excluded from testifying.

The 2014 edition marks the first time that NFPA 921 includes color images.

This enhancement allows us to communicate and demonstrate key concepts and examples more clearly. As a result, readers will gain a better understanding of the principles of fire and explosion investigation.

NFPA 921 also offers essential guidance on:
  • Using the scientific method in origin and cause investigations
  • Documenting an investigation so that all relevant facts are gathered for future use in court
  • Handling fire-related evidence so that it's admissible in court
  • Understanding many of the terms related to explosion and fire investigations
 

Document History

  1. NFPA (Fire) 921


    Guide for Fire and Explosion Investigations, 2024 Edition

    • Most Recent
  2. NFPA (Fire) 921


    Guide for Fire and Explosion Investigations, 2021 Edition

    • Historical Version
  3. NFPA (Fire) 921


    Guide for Fire and Explosion Investigations, 2017 Edition

    • Historical Version
  4. NFPA (Fire) 921

    👀currently
    viewing


    Guide for Fire and Explosion Investigations, 2014 Edition

    • Historical Version
  5. NFPA (Fire) 921


    Guide for Fire and Explosion Investigations, 2011 Edition

    • Historical Version
  6. NFPA (Fire) 921


    Guide for Fire and Explosion Investigations, 2008 Edition

    • Historical Version
  7. NFPA (Fire) 921


    Guide for Fire and Explosion Investigations, 2004 Edition

    • Historical Version
 

Amendments, rulings, supplements, and errata

  1. NFPA (Fire) 921 Errata

    Free
    Download


    Errata to Guide for Fire and Explosion Investigations, 2014 Edition

  2. NFPA (Fire) 921 Errata

    Free
    Download


    Errata to Guide for Fire and Explosion Investigations, 2014 Edition