| Type of Sign | Meaning of Sign | Examples |
|---|---|---|
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Prohibition signs indicate that certain behaviour is not allowed. They are red bordered circular signs with a red crossbar running form top left to bottom right on a white background. Any symbol must be black and placed centrally on the background and must not obliterate the crossbar. Red must cover at least 35% of the area of the sign. |
No Smoking No admittance No naked flame Do not extinguish with water |
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Warning signs give warning of a specified hazard. They are black bordered, triangular signs. Any symbol must be black and placed centrally on the background. Yellow must cover at least 50% of the area of the sign. |
Caution, risk of ionising radiation Danger, corrosive substance Danger, fire hazard Danger, fork lift truck |
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Mandatory signs indicate that a specific course of action is to be taken. They are circular with a blue background. Any symbol must be white and placed centrally on the background. Blue must cover at least 50% of the area of the sign. |
Eye protection must be worn Hearing protection must be worn Wear lung protection |
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Safe condition signs provide information about safe conditions. They are square or oblong with a green background. Any symbol must be white. Green must cover at least 50% of the area of the sign. |
First Aid Emergency shower Eye Wash Directional arrows |