Which method is commonly used to control the perimeter of a fire scene?

Establishing a safety zone is essential for controlling the perimeter of a fire scene. A safety zone provides a protected area where firefighters and other emergency personnel can operate safely, away from the immediate dangers posed by the fire. This area allows for effective coordination of firefighting efforts and ensures that personnel have a secure space to regroup, rehydrate, and strategize without the risk of being endangered by fire spread or hazardous conditions.

In contrast, dispersing chemicals into the air is not a recognized method for perimeter control and may actually create additional hazards. Creating barriers with fire trucks can help block access to the scene but is not a primary method of perimeter control and can be limited by space and maneuverability. Allowing civilians to walk through the area poses a significant risk to their safety and can also hinder firefighting operations, as non-emergency personnel may unintentionally become obstacles or interfere with critical efforts. Hence, the best method for controlling the perimeter effectively is by establishing a safety zone.