What is a key element of on-arrival size-up?

• A. A 360-degree assessment of conditions, occupancy type, hazards, and potential life hazards.
• B. A quick exterior-only view of the building.
• C. A rapid interior sweep before establishing scene safety.
• D. A review of pre-incident plans only.

Answer: (A)

A thorough 360-degree assessment of conditions, occupancy type, hazards, and potential life hazards performed on arrival. This full-circle scan gives you the complete picture you need before deciding on tactics, so you can identify where the fire is, what type of building you’re dealing with, any immediate dangers to occupants or responders, and potential life hazards. It helps you spot indicators that might not be visible from one angle—exposures on other sides, signs of collapse, hidden fires, or people who may still be inside. Rushing an interior sweep or focusing only on the exterior can miss critical clues and put lives at risk, and relying solely on pre-incident plans ignores the real-time conditions you’re entering. By starting with a comprehensive on-arrival size-up, you set safe, informed priorities for evacuation, search, ventilation, and extinguishment.