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 ID: 790118
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Slide1
HOW DOES FIRE GROW?
Slide2The 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
Slide3Camp fires
Everyone has seen one of these
They Have a Simple growth chart
FIRE DOUBLES IN SIZE EVERY 30 SECONDS
Slide4Compartment fires
Ventilation limited
Can be controlled
High pressure
High heat
Slide5Room and contents
Watch for:
Insipient stage
Growth stage
Rollover
Flashover
Decay phase
Slide6smoke
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
Slide7Slide8Thermal layering
Fire department disrupts this layering with water stream which changes to steam and dissipates heat
Slide9Slide10Slide11WHY 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