Fire Behavior Speech - Least Random Number

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Fire Triangle
Fuel
Fire!
Heat
Oxygen
1st Stage: Incipient
• 1st stage
• No visible flame
• Little smoke
• Is not yet self-sustaining
• According to the National Fire Protection Association,
fires in this stage can be controlled with a fire
extinguisher.
2nd stage: Growth
Self-sustaining
Heat of flame ignites more fuel
Size of fire increases, flames reach ceiling
Hot gases spread across the room and raise everything
within the room closer to ignition temperature at the same
time.
• Flashover may occur
•
•
•
•
Flashover
Last Two Stages: Fully Involved and Decay
• Fully Involved
• Everything in the room has
reached its ignition
temperature and is burning
• Decay
• Longest stage
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