HOT/General/TBT-HOT-019
Grinding and Cutting Spark Management
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Toolbox Talk
Grinding and Cutting Spark Management
Grinding and cutting metal produces showers of hot sparks that can travel several metres and ignite combustible materials. On construction sites where timber, insulation, fuel, and waste are present, even a brief grinding operation can start a fire. This talk explains how to manage sparks safely, what precautions are required, and when a hot works permit is needed for grinding and cutting activities.
Key Hazards
Fire ignition from hot sparks landing on combustible materials
Burns to skin and eyes from contact with grinding sparks
Sparks entering floor voids, ducts, or cavities causing hidden fires
Explosion risk when grinding near flammable vapours or gases
Control Measures
- Obtain a hot works permit before grinding or cutting where combustible materials are present nearby.
- Clear all combustible materials within a minimum radius of five metres from the work area.
- Use fire-resistant sheeting or welding curtains to contain sparks where clearance is not possible.
- Position the work so sparks are directed away from combustible materials and traffic routes.
- Ensure a suitable fire extinguisher is immediately available at the point of work during operations.
- Carry out a fire watch for a minimum of 60 minutes after grinding or cutting is completed.
- Check above, below, and behind the work area for combustible materials before starting.
- Wear a full face visor, leather gloves, and flame-resistant clothing during all grinding operations.
- Seal any gaps, holes, or openings through which sparks could travel to concealed combustible areas.
Remember
- A hot works permit is required whenever grinding or cutting is done near combustible materials
- Clear all flammable items within at least five metres of the work area before starting
- Sparks can travel through floor voids and gaps to start hidden fires in unseen areas
- A fire watch of at least 60 minutes is required after grinding or cutting work finishes
- Always position the work so sparks are directed away from people and combustible materials
Applicable Legislation: Regulatory Reform (Fire Safety) Order 2005 · DSEAR 2002 · CDM Regulations 2015 · Health and Safety at Work etc. Act 1974
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