Trench Cut Roof Ventilation

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.

Trench cut roof ventilation.

5 when fire shows from observation cuts. The 7 9 8 ventilation cut provides a preset plan for conducting a cut. The same techniques can be used on a slight pitched peaked roof as well. A trench is cut at least 20 feet from the main vent hole and.

This video gives detailed instructions on how where and why to ventilate a flat roof including how and why to make trench cuts. 0bdecking decking is the material used to comprise the base and exterior covering for the roof. The base material can consist of solid wood. The base is the material attached to the roof rafters.

Large vent h over fire area. 2 observation cuts between fire area and determined trench location. In the 800 block of fairview avenue at the kenwood apartments in arcadia california. Center rafter can also be used for cutting strip ventilation on 1 x 4 or 1 x 6 sheathed roofs.

A trench is cut after the main ventilation hole is cut and extended and inspection holes are made to monitor extension in the cockloft. Cut trench at narrow point and pull ceiling but do not pull trench. Open the trench and operate hoselines. A structure fire was reported at around 6 a m.