Dangerous Parts of Machinery

The following requirements are taken from the standards given in the 1998 regulations on the provision and use of work equipment. Effective measures must be taken to:

Prevent access to any dangerous part of machinery or any rotating stock-bar,


To stop the movement of any dangerous part of machinery or rotating stock-bar before any part of a person enters a danger zone

To achieve this, so far as is practicable, the following hierarchy of control must be applied to determine what level, or combination of levels of protection, is needed:
Level Control
1 Fixed guards enclosing every dangerous part, or rotating stock-bar
2 Provision of other guards (e.g. moveable interlocked guards) OR protection devices (e.g. pendulum switched motor brakes)
3 Provision of jigs, holders, push-sticks or similar protection appliances used in conjunction with the machinery
4 Provision of information, instruction, training and supervision
All guards and protection devices must meet the following requirements:

1. Be suitable.

2. Be of sound material and adequate strength.

3. Maintained in good order and repair.

4. Not give rise to an increased risk to health and safety.

5. Not be easily bypassed or disabled (bypass may be allowed in exceptional and unusual circumstances, for example by use of an over ride key, on condition of alternative suitable controls, as determined by risk assessment, being in place. See Use of Interlock Overrides )

6. Be sited a suitable distance from the danger zone

7. Not unduly restrict the view of the operating cyclewhere such view is necessary

8. Allow access to fit and replace parts and for maintenance work but where possible without having to dismantle or remove the protection device.

Lancaster University
LancasterLA1 4YW United Kingdom
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