Fixed guards prevent access to hazards

If a hazard area rarely needs to be accessed, typically less than once per week, one will use so called fixed guards. A fixed guard is a cover preventing access and holding the hazard inside the machine. It is considered part of the machinery, not a type of optional accessory.

Three basic rules apply to fixed guards:

1. They must be suitable and strong enough for the hazard expected.
2. It must not be possible to remove them without using a tool (a coin is not a “tool”, but a standard screwdriver or wrench is okay). The fasteners must not get lost after removal. So, they have to stay on the guard or at the machine.
3. They must not stay in place when all fasteners have been removed (as far as physically possible and not dangerous – you would not allow a 20 kg panel to just drop to the floor after loosening all bolts on it).

Since fixed guards are not monitored, they must only be removed when the machine is stopped safely. The standards require that they are removed under a “safe system of work” only. That is a formal procedure laid down in writing. 

The procedure should address the following key points:

• Conditions: What conditions must be met before the guard may be removed?
• Purpose: In which situations, or for what reasons, may the guard be removed?
• Authorization: Who is qualified and authorized to remove the guard?
• Hazards: Which risks are present after the guard is removed, and how can they be mitigated?
• Restart Protocol: What steps must be taken before restarting the machine?

For more detailed guidance on machine safety, consult the Axelent Safety Book, which includes the latest standards and practical solutions.