Which design decisions are influenced by life safety analysis?

• A. Structural systems, façade aesthetics, parking layout, and landscaping
• B. Egress widths, stair design, fire resistance, and smoke control
• C. HVAC zoning, color palette, interior finishes, and furniture layout
• D. Roof slope, skylight placement, exterior lighting, and signage

Answer: (B)

Life safety analysis centers on ensuring occupants can evacuate quickly and stay protected during a fire. This drives decisions that directly affect safe egress and fire protection: egress widths to handle the expected occupant load, stair design as protected, accessible routes, the fire resistance ratings of structural and enclosure assemblies to contain fire and provide a stable path for evacuation, and smoke control strategies to limit smoke spread and maintain tenable conditions in escape routes. These elements are the core of how a building is designed to protect life in emergencies.

Other options mix items that, while they may influence safety or performance, do not establish the fundamental protective features that life safety analysis determines, such as general aesthetics, parking, interior finishes, or roof and exterior lighting alone.