Two-in, two-out
Videos
In firefighting, the policy of two-in, two-out refers to United States Occupational Safety and Health Administration policy 29 CFR 1910.134.
Two firefighters entering a building during a training exercise
The term "immediately dangerous to life or health" is defined by the US National Institute for Occupational Safety and Health as exposure to airborne contaminants that is "likely to cause death or imm
Two-in, two-out
…of the building where high temperatures, "heat" and dense smoke are normally occurring) would present an "Immediately Dangerous to Life or Health" (IDLH) atmosphere and therefore, require the use of respirators. There should always be at least two firefighters together when they enter a location that…
Personal protective equipment for IDLH conditions: pressure-demand supplied-air respirator equipped with a full facepiece in combination with an auxiliary pressure-demand self-contained breathing apparatus
Personal protective equipment for IDLH conditions: pressure-demand self-contained breathing apparatus with a full facepiece