OSHA 1926.200 - Accident prevention signs.

Safety signs and symbols should be visible at all times when work is being performed. The signs should be removed or covered promptly when the hazards no longer exist.

Safety signs and tags are used to identify hazardous conditions in the workplace and also provide, in a brief message, a means for personnel or visitors to avoid the hazard.

Danger signs indicate immediate danger, caution signs indicate a possible hazard, and preventative measures are advised whenever either sign is in place.

Safety instruction signs are used wherever safety instructions or reminders are needed. For example, entrance to all shops, laboratories, or other areas which require eye protection should be posted with a sign indicating the requirement. In addition, machines, equipment, or process areas requiring operators to wear specific eye protection should be posted with warning signs.

All safety signs should be manufactured with rounded or blunt corners and be free from sharp edges, burrs, splinters, or other sharp objects. The mounting hardware used should be placed in such a way that it does not constitute a hazard.

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