- Fire-isolated passageway
Fire-isolated passageway means a corridor, hallway, or similar path of travel constructed to be fire-resisting (possessing a specific Fire Resistance Level or FRL). Its primary function is to provide a protected means of egress that connects other fire-isolated exits to a safe discharge point.
To meet the NCC definition, it must:
- Be Fire-Resisting: Constructed with walls, floors, and ceilings that can withstand fire for a set period (e.g., 60/60/60).
- Act as a Link: Provide a safe path of travel to or from a fire-isolated stairway, a fire-isolated ramp, or directly to a road or open space.
- Limit Penetrations: Only allow specific services (like fire hydrants or emergency lighting) to enter the space, ensuring that the "tunnel" remains free of potential fire triggers like electrical distribution boards or storage.
The National Construction Code defines a fire-isolated passageway as;
Fire-isolated passageway: A corridor, hallway or the like, of fire-resisting construction, which provides egress to or from a fire-isolated stairway or fire-isolated ramp or to a road or open space.