First, on any construction site or environment that requires it, Hard hats are to be worn at all times. Hard hats can protect your head from danger. Any position on a construction site is subject to a dangerous situation where their head could be damaged. Proper PPE on a site will minimize this risk. Be sure to wear the appropriate hard hat for the job.
Hard hats come in three classes.
Class A hard hats are made from insulating material to protect you from falling objects and electric shock by voltages of up to 2,200 volts. Class B hard hats are made from insulating material to protect you from falling objects and electric shock by voltages of up to 20,000 volts. Class C hard hats are designed to protect you from falling objects, but are not designed for use around live electrical wires or where corrosive substances are present. Please consult your operating instructions for suggested PPE to be worn before operating any tool or machine. One additional safety note, for those who would be doing outside work, be sure to be aware of your skin's sensitivity to the sun.