OSHA's "Fatal Four" refers to the top four hazards in the construction industry that are responsible for a significant percentage of workplace fatalities. These are:
Falls: These are the most frequent causes of fatalities in the construction sector.
Struck-by: This category includes injuries caused by being hit by objects, such as vehicles or falling objects.
Caught-In or Between: These incidents happen when a worker is caught in or compressed by equipment or objects, struck, caught, or crushed in collapsing structures.
Electrocutions: This involves deaths caused by exposure to electrical hazards​ (construct connect)​​.