When responders are cutting holes in the roof for horizontal ventilation, what must the ISO ensure?

The requirement for placing ladders at two corners of the building during horizontal ventilation is crucial for ensuring the safety of responders. Having ladders positioned at two corners allows for a rapid escape route for personnel who may be on the roof during unpredicted changes in conditions, like fire spread or smoke build-up. This setup enhances situational awareness and provides multiple egress points in case of an emergency.

In addition to this, placing ladders ensures that there is easy access for additional responders or equipment if needed. It is part of establishing a safe perimeter around the area of operation and reinforces good operational practices in fireground safety.

Other key considerations, although important, do not prioritize the immediate safety and versatility required during such high-risk operations as ventilation on a roof. While using the proper saw and ensuring that at least one responder is on the roof are important for effective operations, the dual ladder placement serves as a foundational safety measure critical for all personnel involved on the roof.