Type I construction high-rise buildings are not likely to collapse, making the primary concern the hazard of flying glass from windows.

• A. Flying glass from windows
• B. Gas leaks
• C. Roof collapse
• D. Elevator entrapment

Answer: (A)

In Type I high-rise construction, the structure is designed to be fire-resistive and noncombustible, so collapse during the early to middle phases of a fire is less likely. That stability shifts the primary life-safety hazard to the glass in the windows. Heat from the fire weakens glazing and can cause large panes to crack or explode, sending dangerous shards outward and creating risk for anyone below or near the window area, as well as complicating interior operations and egress. While gas leaks, roof collapse, and elevator entrapment are real concerns in fires, they are not the main hazard driven by this construction type; flying glass is the most immediate and defining danger in this scenario.