How does OSHA define a Confined Space?

A confined space is defined by OSHA as an area that has limited means for entry and exit. This definition is critical for understanding safety protocols in environments where workers may need to enter such spaces. The characteristics of a confined space include having physical restrictions that may make it difficult for individuals to enter, exit, or perform work within the area. This could include places like tanks, vaults, silos, or pipelines.

The emphasis is on the limited means of entry and exit because these factors significantly influence the level of risk involved, such as difficulties during rescues in emergencies or increased hazards from the work being performed inside. Therefore, the defining characteristics of a confined space are not simply about occupancy frequency, ventilation adequacy, or access restrictions, but rather the specific limitations relating to the entry and egress that create unique hazards for workers.