Safety checklist — Concrete sawing and drilling

Sawing, coring and drilling in concrete. Based on Québec's Construction Safety Code (CSTC) and CNESST standards.

Before work

13 items
  • PPE worn: hard hat, splash-proof glasses, hearing protection, anti-vibration gloves

  • Check for electrical/gas/water conduits in cutting zone (detector or plans)Critical

    ℹ️ Piercing a live conduit = risk of fatal electrocution

  • Blade or core bit inspected — no missing or cracked segments

  • Cooling water supply functional and connected

  • Work zone marked off — protect bystanders from debris

  • Cutting equipment secured or anchored to support

  • Respirator per CSTC 3.25.6 for sawing, grinding, sanding — not only dry cuttingCritical

    ℹ️ Unless isolation/confinement or a demonstration under RSST Annex I OELs (quartz 0.05 mg/m³ at the date of this audit).

  • Continuous water spray on blade to suppress dust and cool

  • Never force the blade — let the tool work at its own pace

  • Watch for smoke or overheating — stop immediately if abnormal odor

  • Cutting slurry collected — do not discharge into drains

  • Maintain safe distance from rotating blade

  • Check stability of cut piece before completing the cut

After work

4 items
  • Equipment cleaned, blade removed and stored

  • Slurry and concrete debris collected and properly disposed

  • Openings created protected or marked if fall hazard

  • Cut edges inspected — deburr if sharp

17 verification items — use this checklist on-site with the app

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PDF reports, history and team management in the app

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. Completing a checklist here does not by itself establish your compliance — your exact obligations depend on your job site and your prevention program. Where there is any discrepancy, the official text published by Légis Québec or the CNESST prevails.

Risks and prevention — Concrete sawing and drilling

Concrete sawing and coring produce dust rich in crystalline silica, a recognized carcinogen. RSST Annex I sets the quartz TWAEV at 0.05 mg/m³; CSTC 3.25.6 requires a respirator for sawing unless an exception applies. Wet cutting and HEPA vacuums are source controls (3.25.4).

Diamond blades spin at high speed, creating risks of breakage, projection, and kickback. The operator must verify blade condition, water flow, and workpiece stability before each cut. Sawing zones must be barricaded to protect bystanders.

Diamond drilling into structural slabs can compromise structural integrity if reinforcing steel is cut. GPR or X-ray scanning is recommended to locate rebar before coring.

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