Glossary
Fire behaviour tests in transportation sector

Réaction au feu; Reaction-to-fire

A material's ability to promote or inhibit combustion. Reaction to fire takes into account only the combustion aspect, excluding the emission of smoke and toxic gases.

Comportement au feu; Fire behaviour

The evolution of a material during a fire under various aspects: combustion, smoke emission, gas release, loss of properties (mechanical, insulating...).

Reaction-to-fire classification; Classement de réaction au feu

Rating of a material to characterize its properties in terms of reaction to fire.

Smoke classification

Rating of a material to characterize its properties in terms of smoke opacity and the toxicity of the gases emitted.

Résistance au feu; Fire resistance

The ability of an element to retain all the properties necessary for its use, despite the development of fire, under specified conditions...