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HOW DOES FIRE GROW? The fire triangle

3 combined elements create a continuous chemical reaction resulting in combustion. Take away just one and the chemical reaction is interrupted and the fire goes out. Camp fires. Everyone has seen one of these.

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HOW DOES FIRE GROW? The fire triangle






Presentation on theme: "HOW DOES FIRE GROW? The fire triangle"— Presentation transcript:

Slide1

HOW DOES FIRE GROW?

Slide2

The fire triangle

3 combined elements create a continuous chemical reaction resulting in combustion

Take away just one and the chemical reaction is interrupted and the fire goes out

Slide3

Camp fires

Everyone has seen one of these

They Have a Simple growth chart

FIRE DOUBLES IN SIZE EVERY 30 SECONDS

Slide4

Compartment fires

Ventilation limited

Can be controlled

High pressure

High heat

Slide5

Room and contents

Watch for:

Insipient stage

Growth stage

Rollover

Flashover

Decay phase

Slide6

smoke

Smoke inhalation is the primary cause of death in victims of indoor fires

Extremely toxic Superheated gases

Carbon monoxide

Hydrogen cyanide

AND MORE...

Composition depends on the nature of the fuel

Less oxygen = more smoke

Unburnt byproducts May ignite resulting in backdraft or smoke explosionCollection of airborne solid and liquid particulates and gasses emitted when a material undergoes combustion

Slide7

Slide8

Thermal layering

Fire department disrupts this layering with water stream which changes to steam and dissipates heat

Slide9

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Slide11

WHY ARE DOORS SO Important?

Protection from heat

Limit the flow of oxygen

Limits the spread of toxic smoke

Increases time to escape or for rescue to arrive