A life safety design alternative where occupants are protected within a building space, typically suitable for occupancies like hospitals or prisons, with specific tenability criteria over a longer duration?

• A. America Burning
• B. Defending in Place
• C. Automatic Sprinklers
• D. Access

Answer: (B)

Defending in place is a life safety design approach that keeps occupants protected inside the building rather than evacuating them to the outside environment. This is especially appropriate for settings like hospitals or prisons where moving people quickly is impractical or unsafe. The aim is to keep the space within tenability criteria—stable temperature, limited smoke and toxic gases, and breathable air—for a longer duration so people can stay put until the fire is controlled or they can be safely rescued. Achieving this relies on strong compartmentation with fire-resistant barriers, designated safe or protected areas, effective smoke control, reliable communication, and preserved structural integrity and power to maintain essential functions. In short, the strategy focuses on maintaining a safe indoor environment long enough to manage the incident, rather than defaulting to immediate evacuation.

America Burning refers to a historical national fire policy document rather than a protective design approach. Automatic sprinklers are a crucial safety feature that help control fires, but they describe a system component rather than the overarching occupant protection strategy. Access isn’t a defined life safety strategy for occupant protection in this context.