- Treat every silo and hopper as a confined space requiring a permit to enter
- Isolate all mechanical and electrical equipment before entry using LOTO procedures
- Test the atmosphere for oxygen, flammable gases, and toxic substances before entry
- Ensure a trained rescue team and equipment are on standby throughout the work
- Use a full body harness attached to a tripod and winch for vertical entry
- Confirm stored material has been fully discharged and cannot flow back in
- Maintain continuous communication between entrant and top man at all times
- Ventilate the space mechanically before and during any entry or work
- Brief all personnel on the emergency rescue plan before work begins
- Monitor the atmosphere continuously with calibrated gas detection equipment
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- DON'T enter any silo or hopper without a valid confined space entry permit
- DON'T assume the atmosphere is safe because the silo appears empty
- DON'T stand on bridged material — it can collapse without warning
- DON'T work inside while discharge equipment is still energised or operational
- DON'T enter without a rescue plan, trained standby team, and rescue equipment
- DON'T use the silo ladder for access without a full fall arrest system
- DON'T ignore alarms from gas detection equipment — evacuate immediately
- DON'T allow unauthorised personnel near open silo hatches or access points
- DON'T use tools that could create sparks in a dust-laden atmosphere
- DON'T poke or prod bridged material from inside the silo to free blockages
See also: Confined Space Entry Procedures | Atmospheric Monitoring and Gas Testing
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