Common-sense says that ‘working at height’ means being anywhere off the ground when performing a task. The Health and Safety Executive definition extends that idea with this definition: "Work in any place where, if precautions were not taken, a person could fall a distance liable to cause personal injury. You are working at height if you:
- work above ground/floor level
- could fall from an edge, through an opening or fragile surface or
- could fall from ground level into an opening in a floor or a hole in the ground."
In short, if there’s somewhere lower and a chance of injuring yourself by falling there, you’re working at height.
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