Pre-incident surveys should identify the locations of building features designed to stop the spread of fire. What is one such feature?

• A. Firewalls
• B. Sprinkler Heads
• C. Exit Stairs
• D. Smoke Alarms

Answer: (A)

Fire compartmentation through fire-rated barriers is the concept being tested. A firewall is a fire-rated wall designed to contain a fire within one area and slow or stop its spread to other parts of the building. These barriers have a specified fire-resistance rating and are built to maintain integrity under heat, often extending from foundation to roof with rated openings that are properly fire-stopped. Knowing where firewalls are located in a pre-incident survey helps responders understand how the building is partitioned, which areas may stay protected longer, and how to plan tactics, ventilation, and rescue while anticipating potential paths of flame. Sprinkler heads help control flames within a space, exit stairs provide safe egress, and smoke alarms detect fires; none of these physically halt the spread through compartment walls in the same way a firewall does.