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→Physics of fire
==Physics of fire==
==Physics of fire==
The fire triangle is a term which refers to the three elements necessary for a fire to burn: oxygen, fuel, and a source of heat. Remove any one of the three and the fire can no longer burn. All firefighting tactics are based on removing one or more of the three elements in the fire triangle.
The fire triangle is a term which refers to the three elements necessary for a fire to burn: [[oxygen]], [[fuel]], and a source of [[heat]]. Remove any one of the three and the fire can no longer burn. All firefighting tactics are based on removing one or more of the three elements in the fire triangle.
Types of heat transfer: Radiant, conductive, and convective. Conductive heat is transferred by direct contact with the heat source. Convective heat is transferred by hot gases from the heat source, often to objects above the heat source since heat rises. Radiant heat is transferred through radiation of the heat not involving hot gases. To illustrate, when you hold a metal spoon in a cup of hot coffee and feel the spoon get hot, this is conductive heat. When you stand near a campfire and feel the heat on your face, this is radiant heat. When hot steam is rising from a boiling pot of water, this is convective heat.
==Safety==
==Safety==
* Building standards, firefighting equipment standards, and other standards are set by the [[National Fire Protection Association]], or NFPA.
* Building standards, firefighting equipment standards, and other standards are set by the [[National Fire Protection Association]], or NFPA.
* "Two in, two out" refers to the rule that firefighters never enter a building or other IDLH situation alone but go in as a pair. Two go in and two come out; also, the two in can refer to the two who enter the building while a backup team of two remains outside the building ready to enter if needed.
* "Two in, two out" refers to the rule that firefighters never enter a building or other IDLH situation alone but go in as a pair. Two go in and two come out; also, the two in can refer to the two who enter the building while a backup team of two remains outside the building ready to enter if needed.