Fire Roof Ventilation Cuts

A trench is cut at least 20 feet from the main vent hole and.

Fire roof ventilation cuts.

The 7 9 8 ventilation cut provides a preset plan for conducting a cut. If necessary cut the roof to provide vertical ventilation. If the roof decking is intact locate a natural vent in the roof such as scuttle skylight or vents. Roll the second center rafter and stop at the third inside rafter.

Vertical ventilation is the removal of super heated air gases smoke and pressure inside a closed or vent. Far too often when members cut a roof they make. We ve assembled the gear and now need to get it to the building in one trip. If it is decided that a vent hole is to be cut coordinate a location of the cut with the interior fire attack.

Ventilate openings in the roof such as bulkheads skylights or scuttles. In this article we ll talk about a ground ladder based roof operation on a peaked roof. The cut is the easy part tools of the ventilation trade. Cut approximately 2 to 3 inches inside the rafter.

This will allow ventilation without having to cut the roof. A trench is cut after the main ventilation hole is cut and extended and inspection holes are made to monitor extension in the cockloft. Glendale fire department ventilation training manual. And depending on what the fire conditions are it may literally be the only option.

Move back to the first outside rafter and cut a parallel. Once the location is agreed on prepare for your cut. The same techniques can be used on a slight pitched peaked roof as well.