Fire Roof Ventilation Cuts

Move back to the first outside rafter and cut a parallel.

Fire roof ventilation cuts. Cut approximately 2 to 3 inches inside the rafter. The cut is the easy part tools of the ventilation trade. If necessary cut the roof to provide vertical ventilation. Far too often when members cut a roof they make.

Roll the second center rafter and stop at the third inside rafter. If the roof decking is intact locate a natural vent in the roof such as scuttle skylight or vents. And depending on what the fire conditions are it may literally be the only option. Ventilate openings in the roof such as bulkheads skylights or scuttles.

The same techniques can be used on a slight pitched peaked roof as well. This will allow ventilation without having to cut the roof. We ve assembled the gear and now need to get it to the building in one trip. In this article we ll talk about a ground ladder based roof operation on a peaked roof.

If it is decided that a vent hole is to be cut coordinate a location of the cut with the interior fire attack. The technique of horizontal or lateral ventilation involves the. This venting might suffice for the interior forces to find the fire and extinguish it. 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.

The 7 9 8 ventilation cut provides a preset plan for conducting a cut. A trench is cut after the main ventilation hole is cut and extended and inspection holes are made to monitor extension in the cockloft. Once the location is agreed on prepare for your cut.