Safety Definitions
The Definition of Confined Space
A confined space is large enough to enter and work in, but has limited entry/exit points and isn't designed for people to occupy for extended periods.
A confined space is large enough to enter and work in, but has limited entry/exit points and isn't designed for people to occupy for extended periods.

An area large enough for a worker to enter and perform tasks, but with limited entry/exit points and not designed for continuous occupancy.
A storage tank, sewer, or silo that requires special entry procedures and air monitoring before anyone goes inside.