Canadian building code question

What are the building code requirements for exit passageways in Canada?

An exit passageway is an enclosed, fire-separated horizontal exit component that connects an exit stair to the exterior or to another exit. It must meet the same fire-resistance rating as the exit stair it serves and cannot contain any occupancy or storage use.

Exit passageways solve a common design problem — how to route occupants horizontally from an exit stair to a building exterior when the stair does not discharge directly outside. The code treats them as part of the exit system, which means the fire separation, construction, and hardware requirements are stricter than those for a public corridor.

What to check first

  • An exit passageway is part of the exit system and must meet the same fire-resistance rating as the exit stair it connects to.
  • No occupancy, storage, or service use is permitted within an exit passageway — it is exclusively for egress.
  • Exit passageways are distinct from public corridors and have stricter construction, door, and signage requirements.

Jurisdiction notes

National baseline

The NBC defines exit passageways as part of the exit system and sets fire separation, construction, and hardware requirements accordingly.

Provincial adoption check

Provincial codes may add signage, lighting, or dimensional requirements beyond the NBC baseline for exit passageways.

Project-specific variables

The length, width, and fire-resistance rating of the passageway depend on the exit stair it serves, the occupant load, and the building's overall exit strategy.

Work through it in this order

  1. Determine whether the design requires an exit passageway based on exit stair discharge locations.
  2. Review the NBC exit passageway provisions for fire separation, width, and construction requirements.
  3. Confirm door hardware, signage, and emergency lighting requirements for the passageway.
  4. Check provincial adoption for any additional dimensional or signage requirements.
  5. Document the specific referenced sections for permit submission and coordination.

Common questions

What is the difference between an exit passageway and a public corridor?

An exit passageway is part of the exit system with exit-level fire separation and no occupancy use. A public corridor is part of the access to exit and has different construction and rating requirements.

Can an exit passageway have doors to adjacent spaces?

Generally no. The exit passageway must remain an uninterrupted, enclosed exit path. Any openings must comply with the exit enclosure rules.

What fire-resistance rating is required for an exit passageway?

The passageway must match the fire-resistance rating of the exit stair it connects to, which varies with building height and occupancy.