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The danger incurred by the occupants of a building during a fire results from the diversity of phenomena that can arise: live combustion, pyrolysis of materials at high temperatures, movement of toxic gases, loss of visibility.

The regulations impose minimum building design measures in terms of fire safety in order to ensure the evacuation and protection of occupants, and also facilitate the intervention of emergency services.

Industrial buildings, so-called “high-risk” buildings or classified sites may be regulated by the provisions defined in the Labour Code, in the law on classified facilities (high-rise buildings, public buildings, etc.) or by specific rules.

One of the main fire safety rules is to limit the spread of fire and smoke by confining the fire to the room where it started.

This containment is achieved by compartmentation, which involves partitioning the building into several volumes, creating rooms that are “sealed off” from each other.

The horizontal walls (between levels) or vertical walls (on the same level) of this compartmentation must then comply with the requirements of the fire resistance regulations. Their performance is evidenced by test reports.