What is the standard evacuation time target mentioned?

What is the standard evacuation time target mentioned?

• A. 60 seconds
• B. 90 seconds
• C. 120 seconds
• D. 180 seconds

Answer: (B)

Evacuation time targets set the maximum time allowed for everyone to evacuate a space in an emergency. The idea is to strike a balance between a rapid exit and the realities of how people move, react, and navigate obstacles like doors and stairs. The standard figure typically cited is 90 seconds, which provides a practical upper bound across different building sizes and layouts while still offering strong protection for occupants. Shorter targets, such as 60 seconds, can be unrealistic in larger or more complex spaces, while longer targets like 120 or 180 seconds leave people exposed to danger for too long in many scenarios. So the 90-second target is the best compromise for safety-focused planning.

Evacuation time targets set the maximum time allowed for everyone to evacuate a space in an emergency. The idea is to strike a balance between a rapid exit and the realities of how people move, react, and navigate obstacles like doors and stairs. The standard figure typically cited is 90 seconds, which provides a practical upper bound across different building sizes and layouts while still offering strong protection for occupants. Shorter targets, such as 60 seconds, can be unrealistic in larger or more complex spaces, while longer targets like 120 or 180 seconds leave people exposed to danger for too long in many scenarios. So the 90-second target is the best compromise for safety-focused planning.