What is the first question for work at height?

Can we do it with less exposure? If not, what collective measure is realistic before relying on PPE?

Do scaffolds need daily inspection?

Inspect after erection, after major changes, after events that could affect stability, and at the cadence your program defines.

How should we handle weather?

Wind, rain, and ice change traction and loads. Set clear stop-work criteria and communicate them.

Where is a checklist for my trade?

OK Sécurité groups lists by task—scaffold, hoisting, cross-cutting height work. Pick the list that matches your work.

Guides

Work at height: site prevention

Written by the OK Sécurité team · Updated September 9, 2026

CSTC 2.9.2: ground or a solid base first, then travel restraint, then a net, then a harness. 2.9.1 is not only “more than 3 m”: also 1.2 m on a vehicle, 1.5 m with a load, and no-height cases (liquid, moving part, dangerous equipment).

Plan before you climb

Pick the safest access for the task: work platform, compliant scaffold, lift, lifelines—depending on context.

Plan material handling aloft: anchor points, drop zones, and signage.

Collective protection first

Guardrails, solid platforms, and nets reduce exposure for everyone—not only the person at the edge.

Check installation, component condition, and changes after moves.

Personal systems and anchorage

When collective measures are not feasible, harnesses and anchors must match fall line and clearance.

Inspect lanyards, connectors, and shock absorbers per manufacturer guidance and your program.

Field checks

Review ladders and stepladders: stability, proper extension, and whether work from the top cap is actually allowed.

Use a dedicated checklist so guardrails, decks, access, and weather criteria are not skipped.

Exact requirements depend on regulations and risk analysis. Confirm with your prevention team or CNESST resources. For information only — this is not legal advice. OK Sécurité is an independent company with no affiliation to the CNESST: we are not mandated, endorsed or certified by it. Where there is any discrepancy, the official text published by Légis Québec or the CNESST prevails.

Sources

Informational only. Confirm obligations with your prevention program and:

CNESST — Mesures spécifiques pour les chantiers de construction
Safety Code for the construction industry (CSTC) and Regulation respecting occupational health and safety (RSST)

Official rules

Related checklists

Checklists for height-related work and access:

Browse all checklists View plans

Common questions

What is the first question for work at height?: Can we do it with less exposure? If not, what collective measure is realistic before relying on PPE?
Do scaffolds need daily inspection?: Inspect after erection, after major changes, after events that could affect stability, and at the cadence your program defines.
How should we handle weather?: Wind, rain, and ice change traction and loads. Set clear stop-work criteria and communicate them.
Where is a checklist for my trade?: OK Sécurité groups lists by task—scaffold, hoisting, cross-cutting height work. Pick the list that matches your work.