A hard hat is a type of helmet predominantly used in workplace environments, such as construction sites, to protect the head from injury by falling objects, impact with other objects, debris, bad weather and electric shock. Inside the helmet is a suspension that spreads the helmet's weight over the top of the head. It also provides a space of approximately 30 mm (1.2 inch) between the helmet's shell and the wearer's head so that if an object strikes the shell, the impact is less likely to be transmitted directly to the skull. Sometimes the helmet shell has a mid-line reinforcement ridge, which strengthens it against impact.
Blue-collar workers, especially union shop construction workers, engaged in occupations that require protective equipment are sometimes metonymically referred to as "hard hats".
A bump cap is a lightweight kind of hard hat with simplified suspension or padding in lieu of suspension and having only a chin strap. It is used where there is a possibility of scraping or bumping one's head on equipment or structure projections, but is not strong enough to absorb large impacts, such as from a tool dropped several stories.
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Famous quotes containing the words hard and/or hat:
“Once you get into this great stream of history you can’t get out. You can drown. Or you can be pulled ashore by the tide. But it is awfully hard to get out when you are in the middle of the stream—if it is intended that you stay there.”
—Richard M. Nixon (1913–1995)
“I saw a guide-post surmounted by a pair of moose horns.... They are sometimes used for ornamental hat-trees, together with deer’s horns, in front entries; but ... I trust that I shall have a better excuse for killing a moose than that I may hang my hat on his horns.”
—Henry David Thoreau (1817–1862)