When does flashover typically occur in a fire stage?

Flashover is a critical fire phenomenon that occurs when a fire reaches a state where all combustible materials in the vicinity ignite almost simultaneously, resulting in a rapid increase in the fire's intensity. It typically happens during the fully developed stage of a fire when the temperature of the environment has reached levels that allow for the ignition of combustible materials, leading to a rapid spread of flames.

In the context of the growth stage, it is important to note that the conditions are developing, and while the fire is becoming more intense, flashover has not yet occurred at this point. Flashover manifests when the heat is sufficiently concentrated and sustained, which is characteristic of the fully developed stage, rather than during the earlier growth phase.

Recognizing this distinction is essential for fire safety officers and firefighters, as understanding the stages of a fire allows for better preparation and response strategies. Awareness of when flashover may occur can significantly influence tactics to avoid dangerous conditions during firefighting operations.