Confined spaces are harmless as long as they are not occupied. But when workers enter a confined space to inspect the equipment, fix leaks, or do construction work, they can encounter toxic gasses, corrosive chemicals, flammable solvents, or machines that start unexpectedly. A confined space can be difficult or impossible to exit if something goes wrong. And would-be rescuers can share the fate of those they are trying to rescue. This guide explains how to identify confined spaces and how to protect general industry and construction workers who may need to enter them.
