In simple terms, fire compartmentation is the practice of dividing a building into smaller, fire-resistant sections. The goal is to contain a fire and its by-products (smoke, heat, and toxic gases) within the compartment of origin for a specified period of time. This prevents the fire from spreading, giving occupants time to evacuate safely and allowing emergency services to respond more effectively.
How Does it Work?
Fire compartmentation is achieved through a system of “passive fire protection” measures. These are built-in elements of a building’s structure that act as a barrier to fire.
- Fire-Rated Walls & Floors: These are constructed from materials designed to resist fire for a set duration, often 30, 60, or 120 minutes.
- Fire Doors: These are specialised doors that maintain the integrity of a compartment where there is a necessary opening, such as for a corridor or staircase. They must be self-closing to be effective.
Barriers and Seals: Any gaps or penetrations in a fire-rated structure—for things like pipes, cables, or ducts—must be sealed with fire-stopping materials to prevent fire and smoke from bypassing the compartmentation.