What type of cut is used in vertical ventilation operations?

In vertical ventilation operations, the cut typically utilized is the Kelly cut. This method is particularly effective as it allows firefighters to create an opening in the roof that facilitates the removal of hot air, smoke, and toxic gases from a structure, helping to improve visibility and conditions for those inside.

The Kelly cut is characterized by a series of cuts that form a rectangle or a square, generally starting with a horizontal cut followed by vertical cuts on either side. This configuration allows for efficient removal of roofing material and helps maintain structural integrity during the process, making it ideal for fire situations where rapid venting is necessary.

Understanding the Kelly cut is crucial for firefighters because it enhances safety and effectiveness in controlling the fire environment. It is essential to use appropriate techniques to ensure that the operation does not jeopardize the roof's stability, thus protecting firefighters who may be working below.