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Workplace Health and Safety
Firefighters

What are the three legs of the fire triangle?

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June 09, 2012 10:46PM

Oxygen, Fuel and Heat - all required for a fire to burn.

Modern models include "chemical reaction", making it a fire tetrahedron. This was added to explain the relationship between the other three legs. In other words, you could have fuel, oxygen and heat, but you won't have "fire"until there is a chemical reaction, usually with sufficient heat to make it a chain reaction.