Occupational Health, Safety and Environment on the Carpentry Site
This section tests how you identify hazards, choose controls, and work without harming people, property, or the environment on a Sri Lankan carpentry site. Expect questions on PPE, housekeeping, working at height, electrical safety, dust and chemical control, manual handling, emergency arrangements, and waste.
Core rules
- Apply the hierarchy of control: eliminate, substitute, engineer, administrate, then PPE. PPE is the last line of defence, not the first.
- Keep access and egress clear; store timber on bearers, not on the ground; remove offcuts and shavings daily.
- For work at height, use guarded scaffolds or mobile towers. Ladders are for access, not as work platforms, and should be set at about 4:1 (1 m out for 4 m up).
- Use 110 V site tools or RCD protection; inspect leads; never run cables through water or across walkways.
- Control dust at source with extraction or wet methods; wear eye protection and hearing protection near saws and routers.
- Segregate waste into timber, metal, packaging, and chemicals; never burn treated timber or dump it in drains.
Worked example
A gang must cross-cut 80 treated pine studs beside an occupied building. Control 1: eliminate by ordering pre-cut studs. If that is not possible, substitute a hand saw for small cuts. Engineer: use a circular saw with dust extraction on a stable trestle. Administrate: barricade the cutting zone, rotate workers, and schedule noisy work away from meetings. PPE: goggles, hearing protection, dust mask, and safety footwear. The reasoning is that each control reduces exposure before relying on the worker; a mask alone does not control the hazard.
Traps
- Treating a dust mask as sufficient control for silica or treated-timber dust.
- Leaving scaffold gaps or unguarded openings.
- Using damaged extension leads and homemade adaptors.
- Burning offcuts, which releases toxic smoke.