What are the key elements of size-up when arriving at a reported structure fire?

• A. Building type, occupancy, forces needed, water source, path to interior, hazards, and exposures
• B. Color of the building and number of windows
• C. Date of construction
• D. Ownership of building

Answer: (A)

Size-up on arrival at a reported structure fire focuses on quickly identifying what you’re dealing with and what could threaten safety. The essential factors are building type and occupancy, which help predict fire behavior and where occupants might be; the forces needed and water source, determining how many firefighters and what equipment are required; the path to interior, guiding safe entry and egress; and the hazards inside plus exposures outside, which shape suppression tactics and protection of nearby structures. Other details like the color of the building, the number of windows, the date of construction, or ownership don’t provide actionable information for making immediate, safe, and effective fireground decisions.