Fire Roof Ventilation Cuts

And depending on what the fire conditions are it may literally be the only option.

Fire roof ventilation cuts.

We ve assembled the gear and now need to get it to the building in one trip. Vertical ventilation is the removal of super heated air gases smoke and pressure inside a closed or vent. The technique of horizontal or lateral ventilation involves the. A trench is cut at least 20 feet from the main vent hole and.

Glendale fire department ventilation training manual. A common time frame established for failure of a lightweight truss is between 5 and 15 minutes under fire conditions not much time for fire departments to operate within to cut a hole for vertical. Far too often when members cut a roof they make. This venting might suffice for the interior forces to find the fire and extinguish it.

If necessary cut the roof to provide vertical ventilation. The same techniques can be used on a slight pitched peaked roof as well. A trench is cut after the main ventilation hole is cut and extended and inspection holes are made to monitor extension in the cockloft. The cut is the easy part tools of the ventilation trade.

In this article we ll talk about a ground ladder based roof operation on a peaked roof. Once the location is agreed on prepare for your cut. This will allow ventilation without having to cut the roof. Cut approximately 2 to 3 inches inside the rafter.

The 7 9 8 ventilation cut provides a preset plan for conducting a cut. Roll the second center rafter and stop at the third inside rafter. If it is decided that a vent hole is to be cut coordinate a location of the cut with the interior fire attack.