What is rollover in the context of fire safety?

Rollover refers to a specific phenomenon in fire dynamics where ignitable gases generated during a fire rise to the ceiling and can then spread horizontally before igniting. This occurs when combustible gases produced by burning materials accumulate near the ceiling and reach a temperature high enough to ignite, potentially leading to a rapid spread of fire and increasing danger for occupants and firefighters.

In the context of fire safety, understanding rollover is critical for both prevention and response strategies, as it highlights the importance of ventilation and the assessment of fire conditions within a structure. Recognizing the signs of rollover can help fire safety personnel make informed decisions regarding evacuation, suppression tactics, and the protection of life and property.