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  1. Home
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  3. Confined spaces
Topic

Confined spaces

Tanks, manholes and pits: test the air, permit the entry, plan the rescue first.

Key points

  • Nobody enters a confined space without a risk assessment and a valid entry permit posted at the entrance.
  • Test the air from outside first: oxygen 19.5% to 23.5%, flammables below 10% of the LEL, toxics below the PEL.
  • An attendant stays outside the whole time, keeps contact and calls the rescue team. They never go in to help.
  • Have a written rescue plan, trained rescuers and rescue equipment at the entrance before anyone goes in.
Know itConfined space safety: what supervisors need to knowHow to control confined space entry: gas testing limits, entry permits, attendants, ventilation and rescue plans, with Singapore legal requirements.Read the guide → Check itConfined space entry checklistPre-entry and during-work checks for confined spaces: isolation, gas tests, permit, attendant, ventilation, lighting and rescue readiness at the entrance.Open the checklist → Brief itToolbox talk: confined spacesA five-minute crew briefing on confined space entry: testing the air, the permit, the attendant's role and why you never go in after a casualty.Use the toolbox talk →

All confined spaces resources

Guide

Confined space safety: what supervisors need to know

Wei Ling Chen · Oct 20, 2026
Checklist

Confined space entry checklist

Wei Ling Chen · Oct 20, 2026
Toolbox talk

Toolbox talk: confined spaces

Nurul Hidayah Binte Azman · Oct 20, 2026

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