Which of the following is a way to expand a cut?

• A. With Construction
• B. Expanded With Construction
• C. Expanded Against Construction
• D. Expanded Without Construction

Answer: (A)

Expanding a roof cut during vertical ventilation must be done with construction to keep the structure safe and the opening stable. As you widen the opening, you remove more material that was bearing load, so additional support around the cut is essential. Using temporary shoring, truss reinforcement, or other construction around the new edges protects the remaining roof structure from collapsing and provides a controlled space for firefighters to operate and for heat and smoke to vent effectively. Expanding without construction leaves the roof unsupported, increasing the risk of collapse and dangerous flow of gases. That’s why expanding with construction is the correct approach.