In 1970, the Occupational Safety and Health Administration was formed to help protect workers against unsafe construction practices and hazardous conditions. Workers can take a OSHA training and safety class and receive a certificate showing completion of the course.
During the class, workers learn about the importance of safety gear. Hard hats must be worn on most construction sites, so it is common to see businessmen in suits and businesswomen in suits, skirts or dresses wearing hard hats while they are on location. Boots must have a steel toe and be puncture-proof, and American National Standards Institute safety glasses are marked Z87.1. according to the website Buildingcareers.org.
The Z87.1 marking signifies that extensive testing was performed to ensure protection against flying objects, molten metal, liquid chemicals, acids, chemical gases and dangerous light radiation, in keeping with OHSA requirements.