Trench Cut Roof Ventilation

The base is the material attached to the roof rafters.

Trench cut roof ventilation. 2 observation cuts between fire area and determined trench location. The base material can consist of solid wood. This video gives detailed instructions on how where and why to ventilate a flat roof including how and why to make trench cuts. 5 when fire shows from observation cuts.

Position hose lines underneath and above. In the 800 block of fairview avenue at the kenwood apartments in arcadia california. Open the trench and operate hoselines. The trench cut otherwise known as strip ventilation is a long narrow ventilation hole that acts as a fire break on the roof of a structure that is being attacked by fire.

Cut trench at narrow point and pull ceiling but do not pull trench. 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 same techniques can be used on a slight pitched peaked roof as well. The 7 9 8 ventilation cut provides a preset plan for conducting a cut.

0bdecking decking is the material used to comprise the base and exterior covering for the roof. Far too often when members cut a roof they make. Ventilation flat roof operations 2. A trench is cut at least 20 feet from the main vent hole and.