Quick Answer: What is the definition of fire per NFPA 921?

NFPA 921 3.3.53) Fire Cause : The circumstances, conditions, or agencies that bring together a fuel, ignition source, and oxidizer (such as air or oxygen) resulting in a fire or a combustion explosion. (

What are the 4 key elements of fire investigation?

With few exceptions, the proper methodology for a fire or explosion investigation is to first determine and establish the origin(s), then investigate the cause: circumstances, conditions, or agencies that brought the ignition source, fuel, and oxidant together.

What are the classifications of fire causes?

There are four classifications of fire cause: accidental, natural, incendiary, and undetermined.

What is a flame vector analysis?

Heat and flame vector analysis was used as a process within these studies to document the direction of fire travel, location and magnitude of fire patterns, as well as a process of confirming the area of origin.

What is the first parameter to have fire?

The fire triangle identifies the three needed components of fire: fuel (something that will burn) heat (enough to make the fuel burn) and air (oxygen)

What are the two types of fire investigation?

Depending on how much evidence is present, an investigator can use different approaches. Two techniques include process of elimination, or disregarding the causes that the evidence deems not possible. The second is to start investigating the most probable cause first until it is ruled unlikely.

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What are the basic fire investigation methods?

Basic Methodology, Chapter 4 of NFPA 921, lists the steps of the scientific method as follows: Recognize the need, define the problem, collect the data, analyze the data, develop a hypothesis, test the hypothesis, and select a final hypothesis.

What is the first step in a fire investigation?

The first step in a fire investigation is the preliminary scene examination/size-up. For best results, a trained fire investigator should be notified about and respond to serious fires or possible arson fires immediately after fire apparatus is dispatched.

Tame a raging fire