Trench Cut Roof Ventilation

A structure fire was reported at around 6 a m. A trench is cut after the main ventilation hole is cut and extended and inspection holes are made to monitor extension in the cockloft. Position hose lines underneath and above.

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Center rafter can also be used for cutting strip ventilation on 1 x 4 or 1 x 6 sheathed roofs.

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. 2 observation cuts between fire area and determined trench location. Cut trench at narrow point and pull ceiling but do not pull trench. This video gives detailed instructions on how where and why to ventilate a flat roof including how and why to make trench cuts.

Ventilation flat roof operations 2. Large vent h over fire area. Far too often when members cut a roof they make. 0bdecking decking is the material used to comprise the base and exterior covering for the roof.

5 when fire shows from observation cuts. The same techniques can be used on a slight pitched peaked roof as well. The base material can consist of solid wood. In the 800 block of fairview avenue at the kenwood apartments in arcadia california.

The base is the material attached to the roof rafters. Open the trench and operate hoselines. A trench is cut at least 20 feet from the main vent hole and. The 7 9 8 ventilation cut provides a preset plan for conducting a cut.