Work in Confined Spaces
1. Definition
A confined space is any setting with limited entry and exit openings and adverse natural ventilation in which toxic or inflammable pollutants or an oxygen-poor atmosphere may accumulate and which is not conceived for continued use by a worker.
These may be of several types:
Confined spaces which are open at the top and with a depth that hinders their natural ventilation; for example:
- Cesspits.
- Vats.
- Pits.
- Open tanks.
Confined spaces which are closed with a small entrance and exit opening; for example:
- Underground transformer rooms.
- Tunnels.
- Sewers.
- Service galleries.
- Underground utility shafts.
- Storage and settling tanks and similar.
2. Reasons for Accessing
- Construction work.
- Repairs.
- Cleaning.
- Painting.
- Inspection.
- Installation of Trays.
- Wiring.
- Rescue.
- Etc.
3. General Hazards
Those which, apart from the hazardousness of the atmosphere inside, are due to the deficient material conditions of the space as a workplace.
- Becoming trapped.
- Electrocution.
- Falls.
- Postural Risks.
- Problem of Communication.
- Physical Atmosphere: Heat and Cold / Noise / Vibrations / Lighting.
