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Confined Space Definitions
One of the most difficult concepts to grasp is the difference between confined spaces and permit-required confined spaces.
A confined space is any space that has limited or restricted means of entry or exit, is large enough for an employee to enter and perform assigned work, and is not designed for continuous occupancy by the employee.
Examples are underground vaults, tanks, storage bins, pits and diked areas, vessels, and silos. They have limited entry (usually a hatch or a manhole), are large enough for an employee to get inside, but are not really meant to be occupied by people.
