Canadian building code question

What are the building code requirements for fall arrest anchors on roofs in Canada?

Permanent roof fall arrest anchors in Canada must satisfy provincial occupational safety regulations (often referencing CSA Z91) for ongoing maintenance access, while the building code addresses how the anchor connects to and loads the roof structure.

Roof anchor obligations sit at the intersection of construction code and occupational safety regulation, so designers often miss one side or the other. The building code controls how the structural anchor attaches; the OHS regulator controls when anchors are required for ongoing access.

What to check first

  • Confirm whether ongoing roof access for maintenance or window washing is anticipated, since that drives the OHS requirement.
  • Design the anchor connection to the roof structure as a building-code structural item.
  • Verify the system meets the applicable CSA Z91 or provincial OHS standard for fall arrest equipment.

Jurisdiction notes

Provincial OHS leads

Occupational health and safety regulators in each province set when fall protection is required for ongoing roof work.

CSA Z91 is the typical anchor standard

CSA Z91 governs the equipment side of suspended access and fall arrest; provinces incorporate it by reference.

Building code covers structural connection

The building code addresses how the anchor attaches to the structure, including pull-out and edge-distance design.

Work through it in this order

  1. Map the expected ongoing roof activity: maintenance, window washing, mechanical service, or photovoltaic upkeep.
  2. Identify the OHS regulator's expectations for permanent anchors.
  3. Locate anchor points so they capture the work zones with appropriate clearance and swing-fall control.
  4. Design the structural connection with the building's engineer of record.
  5. Provide a site-specific fall protection plan and inspection regime as a closeout deliverable.

Common questions

Are roof anchors always required in Canada?

No, but ongoing roof work usually triggers them under provincial OHS rules, and many new buildings are anchored proactively.

What standard governs roof anchor design?

Equipment performance is typically governed by CSA Z91; structural attachment falls under the building code.

Does the building official inspect roof anchors?

Building officials inspect the structural connection. OHS verification, including the fall protection plan, is separate.