HARD HAT (SAFETY HAT)

Hard hat is  a lightweight protective helmet (plastic or metal) worn by construction workers. synonyms: hard hat, tin hat. type of: helmet. a protective headgear made of hard material to resist blows.

The purpose of a hard hat is to protect the head from the shock of a falling object, penetration by sharp objects, and from exposed electrical conductors. Tasks. Hard hats must be worn in all areas where there is possible danger of head injury.