Fire Roof Ventilation Cuts

Once the location is agreed on prepare for your cut.

Fire roof ventilation cuts.

Roll the second center rafter and stop at the third inside rafter. The cut is the easy part tools of the ventilation trade. Cut approximately 2 to 3 inches inside the rafter. 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. This venting might suffice for the interior forces to find the fire and extinguish it. Move back to the first outside rafter and cut a parallel. In this article we ll talk about a ground ladder based roof operation on a peaked roof.

A trench is cut at least 20 feet from the main vent hole and. 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. Glendale fire department ventilation training manual. This will allow ventilation without having to cut the roof.

If necessary cut the roof to provide vertical ventilation. Ventilate openings in the roof such as bulkheads skylights or scuttles. If the roof decking is intact locate a natural vent in the roof such as scuttle skylight or vents. The same techniques can be used on a slight pitched peaked roof as well.

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