Canadian building code question

What handrail requirements apply to stairs in Canada?

Handrail requirements depend on the stair type, stair width, the number of risers, whether the stair is an exit stair or access to exit, barrier-free design provisions, and how the province adopts or amends the national code. Height, continuity, graspability, and extension conditions can all vary with the stair condition.

Handrails are governed by multiple code provisions that address height, graspability, continuity, extensions, and placement depending on the stair's function and width. An exit stair in a Part 3 building faces different handrail obligations than a residential stair under Part 9. Barrier-free design provisions add another layer. The safest approach is to confirm the stair type and building classification first, then verify each handrail condition against the cited code provisions.

What to check first

  • Identify the stair type and function — exit stair, access-to-exit, or interior non-exit stair — because handrail obligations differ for each.
  • Check handrail height, graspability, continuity, and extension requirements, as these are the conditions most commonly reviewed during plan check.
  • Verify barrier-free design provisions and provincial amendments, since both can add or modify handrail requirements beyond the general egress provisions.

Jurisdiction notes

National baseline

Start with the NBC provisions covering handrail height, placement, graspability, and extensions for exit stairs and other stair types.

Province and edition check

Confirm whether the province amends handrail provisions, adopts a different code edition, or layers additional requirements through accessibility standards.

Project-specific variables

Stair function, stair width, number of risers, Part 3 vs. Part 9 classification, and barrier-free design obligations can all change the handrail requirements.

Work through it in this order

  1. Confirm the stair type, function, width, and whether the building is classified under Part 3 or Part 9.
  2. Review the NBC handrail provisions for height, placement, graspability, continuity, and extensions applicable to the identified stair condition.
  3. Check barrier-free design provisions for additional handrail requirements on accessible stairs.
  4. Verify provincial adoption and any local amendments before finalizing the handrail specification.

Common questions

Are handrails required on both sides of every stair?

Not always. The requirement for handrails on one or both sides depends on the stair width, stair function, occupant load, and whether barrier-free design provisions apply.

What is the required handrail height for an exit stair?

The height depends on the applicable code provision for the stair type. The NBC specifies a range, but the exact requirement can vary with provincial adoption and barrier-free design provisions.

Do residential stairs have different handrail requirements?

Yes. Part 9 residential stairs typically have different handrail provisions than Part 3 commercial or institutional exit stairs, including differences in height, graspability, and extension conditions.