NFPA 921, Guide for Fire and Explosion Investigations, 2021 Edition

Description

NFPA 921, Guide for Fire and Explosion Investigations, 2021 Edition

The NFPA 921 2021 edition is the National Fire Protection Association guide to working out where a fire started, what caused it, and who or what bears responsibility. It applies the scientific method to origin and cause work: form a hypothesis, test it, and rule out the alternatives before settling on a conclusion. The Organization of Scientific Area Committees (OSAC) recommends it as the forensic science guide for fire investigations.

Fire investigators, forensic engineers, insurance adjusters, attorneys and expert witnesses cite it across the United States and beyond. When a finding has to survive cross-examination, how the investigator got there counts for as much as the answer.

What the guide covers

• The scientific method in origin and cause investigation: hypothesis development, testing, and ruling out alternatives before reaching a conclusion.
• Fire pattern analysis and arc mapping, reading burn patterns and electrical arc damage as evidence of fire travel and origin.
• Documenting the scene. Photography, diagrams, notes and reporting practices that keep the relevant facts usable if the matter reaches litigation.
• Evidence handling: collection, preservation and chain of custody, so physical evidence stays admissible.
• Explosion investigation, covering dynamics, damage assessment and the analysis that separates explosion effects from fire effects.
• Defined terminology that gives investigators, counsel and courts a shared vocabulary.

What is new in this edition

• Fire pattern material that was previously scattered through the guide is consolidated into Chapter 6.
• Chapter 6 has been restructured and rewritten so that fire pattern analysis and arc mapping become one origin-determination process. Arc mapping is now treated as a form of fire pattern analysis.
• Chapter 20, Classification of Fire Cause, has been deleted and its content folded into Chapter 19, Fire Cause.
• Expanded full-colour imagery illustrating core concepts and worked examples.

Who works from it

Fire and arson investigators, including candidates preparing against the NFPA 1033 professional qualifications. Fire officers and public safety personnel who carry investigation duties. Forensic engineers, cause-and-origin consultants and expert witnesses. Insurance claims investigators and subrogation specialists. Attorneys handling fire loss, product liability and arson matters.

Book details

• Title: NFPA 921, Guide for Fire and Explosion Investigations
• Edition: 2021 Edition
• Publisher: National Fire Protection Association (NFPA)
• ISBN-13: 9781455926466
• Format: Paperback

Questions buyers ask

Is this the current 2021 edition?

Yes. ISBN 9781455926466 is the 2021 edition of NFPA 921, published by the NFPA.

Is NFPA 921 a code or a guide?

It is a guide. It sets out the methodology the fire investigation profession works to rather than mandatory requirements, and OSAC recommends it as the forensic science guide for fire investigations.

What actually changed from the 2017 edition?

The largest change is Chapter 6, which now combines fire pattern analysis and arc mapping into a single origin-determination process. Chapter 20 was also deleted and its content moved into Chapter 19, Fire Cause.

Will this help me prepare for fire investigator certification?

Investigators working toward the NFPA 1033 professional qualifications use it as their methodology reference. It is a technical guide, not a study guide with practice questions.

What format does it ship in?

Paperback, printed in full colour with photographs and diagrams throughout.