Protect you from falling or flying materials or swinging objects, and some are rated to protect against accidental head contact with electrical shock and burn hazards or in case of things might fall from above and strike you on the head, or you might bump your head against fixed objects, such as exposed pipes or beams. You should put it on from the moment you set foot in the workplace until you walk off.
Make sure you check the hats ratings to ensure it's the right hardhat for the tasks at hand it should be worn with the visor the bill the front according to the manufacturer's specifications, hard hats are made up of two essential parts the shell and the suspension, the cover protects you from the impact while the suspension serves as a shock absorber and both are necessary to provide full protection. Hard hats must meet ANSI Standard Z 89.1
The suspension has a headband that's adjustable for a comfortable fit adjust your hard hat using the clip or the ratchet to keep your hard hat in good condition don't drill it, paint it, or try to clean it with solvents routinely inspect your hard hat to make sure it's in good condition, checking for dents cracks or deterioration, the hard hat suspension needs to be replaced yearly per most manufacturers and the shell replaced every five years if it never fails an inspection harsh chemicals and extreme temperatures can make a hard hat degrade more quickly and must be replaced more frequently if the hard cap has taken a blow or electrical shock it must be replaced immediately.
