Dry Cutting, Damaged Cord and Blocked Fire Exit
On the 12th floor of a residential project, eight workers are tiling three bathrooms. Two wet saws are set up in the corridor, and one worker is dry-cutting 30 porcelain tiles with a 4-inch angle grinder inside a bathroom with the door closed. A coiled extension cord has a 40 mm section of damaged insulation and is plugged into a temporary board. Tile boxes are stacked 1.8 m high in the fire exit corridor, adhesive bags are open, and a water hose has leaked 2 m² across the passage. A worker slips but catches a door frame. The 5S audit is scheduled for the next morning.
1. Identify the hazards and the immediate controls you would put in place.
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Hazards: respirable crystalline silica from dry-cutting 30 tiles indoors; damaged extension cord and temporary board (electric shock and fire); tiles stacked 1.8 m in a fire exit (egress obstruction and falling load); open adhesive bags (dust and slips); 2 m² water spill (slip). Controls: eliminate dry cutting - use wet saws with water, or a grinder with dust shroud and HEPA extraction. If dry cutting is unavoidable, isolate the area, use local exhaust, and wear a P2/P3 respirator plus eye and hearing protection. Remove the damaged cord from service and tag it; use RCD protection and route cables overhead. Move tiles to a designated lay-down area no higher than 1.2 m and keep the fire exit clear. Close adhesive bags and clean spills immediately. Report the near miss.
2. Propose a 5S plan for the following morning's audit.
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5S plan: Sort - remove unused tools, offcuts, and empty bags from the corridor. Set in order - designate a cutting zone near water and ventilation, a tile storage area, an adhesive mixing station, and a waste bin; mark with floor tape. Shine - clean the 2 m² spill, sweep dust, wipe tools, and inspect cords. Standardise - post a one-page zone layout and cutting SOP at the entrance. Sustain - assign a daily 10-minute clean-up and a weekly audit with names. For the audit, photograph before and after and record corrective actions with dates. Keep the fire exit and access to the temporary board clear. Store tiles on a flat pallet, not against a wall.
3. Write the key points for a toolbox talk to the crew that same afternoon.
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Toolbox talk points: silica dust is invisible; dry-cutting indoors without extraction is not permitted. Wet cutting or dust extraction plus a respirator is required. Inspect cords and plugs before use; damaged tools are tagged out. Keep walkways and fire exits clear; stack tiles low and stable. Clean water spills immediately and wear slip-resistant footwear. Report near misses - the slip could have been a fracture. Explain the 5S layout and ask each worker to name one thing they will change. Record attendance. Follow up the next day to check the cord is still out of service and the corridor is clear.