Trench Cut Roof Ventilation

Open the trench and operate hoselines. A trench is cut at least 20 feet from the main vent hole and. 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.

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Discuss is the trench cut an offensive or a defensive operation.

Trench cut roof ventilation.

Cut trench at narrow point and pull ceiling but do not pull trench. Large vent h over fire area. A trench is cut after the main ventilation hole is cut and extended and inspection holes are made to monitor extension in the cockloft. 2 observation cuts between fire area and determined trench location.

Position hose lines underneath and above. Delmar handbook 3rd edition pages 643 668. 5 when fire shows from observation cuts. Ventilation trench cut firefighter training references.

The trench is often improperly used as fire officers and incident commanders forget that this operation does not replace the need for a primary vent hole over the fire area.