Differentiate between safe evacuation time and total evacuation time.

• A. Safe evacuation time is time to reach a place of safety or tenable area; total evacuation time is the time for all occupants to leave the building.
• B. Safe evacuation time equals total evacuation time.
• C. Safe evacuation time is only the time to evacuate the immediate area; total evacuation time includes re-entry.
• D. Safe evacuation time refers to only disabled occupants.

Answer: (A)

Safe evacuation time is the time it takes for occupants to reach a place of safety or a tenable area, while total evacuation time is the time until all occupants have left the building. This means you stop the safe evacuation timer when someone has reached a safe or tenable location, not when the building is completely empty. The total evacuation time, on the other hand, continues until the last person has exited the building. That distinction is exactly what the statement captures.

The other ideas mix up the scope: assuming safe time equals total time ignores that people may reach safety before everyone has left the building; narrowing safe time to only the immediate area or including re-entry misstates the sequence of events; and focusing only on disabled occupants misrepresents the broader concept of evacuation timing.