A "mandatory sign" means a sign of prescribing behaviour. These signs are required to be blue. A mandatory sign shall show only what action is required. Mandatory signs generally use a white safety symbol on a blue background. Mandatory safety signs are not, as some people believe, 'those which are required by law'. There are 5 different types of safety sign - which type is 'required' by law or by common sense - depends on the situation and type of risk being address by their use
Health and safety signs are everywhere. At work, in public buildings, we see them daily. There are 5 health and safety signs, and they all mean different things.
The 5 types of health and safety signs are:
But how do you know which type of sign is which, and what they mean?
Well, they send their message through shape and colour. Once you know what you are looking for, you can quickly understand the exact meaning of the sign (even without reading the words).