JHA Example: Saw cut and core a concrete slab
Scanning, wet saw cutting, core drilling, and slurry cleanup on an existing slab, with Table 1 silica controls.
5 steps · highest risk before controls 16 · highest after 6
Job hazard analysis
Saw cut and core a concrete slab
Free Safety Report
Job steps, hazards, and controls
| # | Job step | Hazards | Controls | Before | After |
|---|---|---|---|---|---|
| 1 | Scan the slab and mark embedded items | Electrical shock and electrocutionStored energy and lockout | - Scan and mark conduit, rebar, and post-tension tendons before cutting - De-energize and lock out circuits that run through the cut area - Do not cut where a post-tension tendon is marked | 153×5High | 51×5Moderate |
| 2 | Set up the walk-behind saw with water feed | Respirable crystalline silicaElectrical shock and electrocutionSlips, trips, and same-level falls | - Water delivery to the blade as listed in Table 1 - GFCI protection on all cords - Contain slurry and keep cords out of standing water | 123×4High | 42×2Low |
| 3 | Cut the slab | Respirable crystalline silicaHigh noiseFlying particles and eye injuriesPinch points and caught-in or between | - Water running whenever the blade is cutting - Blade guard in place, and hands and feet clear of the blade - Hearing protection for the operator and anyone nearby - Face shield over safety glasses | 164×4High | 62×3Moderate |
| 4 | Core drill penetrations | Respirable crystalline silicaHand and power toolsHeavy lifting and manual handling | - Wet coring, or a vacuum dust collector as listed in Table 1 - Anchor or vacuum-mount the drill rig - Two people to move the rig | 93×3Moderate | 42×2Low |
| 5 | Clean up slurry and dust | Respirable crystalline silicaSlips, trips, and same-level fallsChemicals and chemical burns | - Wet sweep or HEPA vacuum. No dry sweeping - No compressed air for cleaning - Gloves for slurry, and wash skin after contact | 93×3Moderate | 31×3Low |
Risk = likelihood × consequence (1 to 5 each).1 to 2 Negligible3 to 4 Low5 to 9 Moderate10 to 16 High20 to 25 Extreme
PPE required
✓Hard hat
✓Safety glasses with side protection
High-visibility vest
✓Work gloves
✓Safety-toe boots
✓Hearing protection
✓Face shield
Full-body harness and lanyard
✓Respirator
Cut-resistant gloves
Equipment in use
Ladder
Scaffold
Scissor lift
Boom lift
Forklift or telehandler
Crane
Excavator
Skid steer
✓Power tools
Powder-actuated tools
Torches or welding
✓Concrete saw
Generator
Air compressor
Emergency information
Crew review. By signing, I confirm I reviewed this JHA before starting work.
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Scores are examples of the method on the 5x5 risk matrix. Score your own job with your crew. Hazard levels: 1 to 2 Negligible, 3 to 4 Low, 5 to 9 Moderate, 10 to 16 High, 20 to 25 Extreme.
Hazards in this example
- Respirable crystalline silica 29 CFR 1926.1153
- High noise 29 CFR 1926.52
- Electrical shock and electrocution 29 CFR 1926.404
- Flying particles and eye injuries 29 CFR 1926.102