Limited openings for entry and exit
A confined space may be difficult to enter or perform repair work or general maintenance. If something goes wrong in a confined space while workers are inside of it, escape or rescue may be difficult. However, just because a work area has more than one exit or way of escape, it does not mean it is not a confined space. If the space has limited ways to get and out, it could classify as a confined space. For example, an open-top tank would have limited openings for entry and exit.
The space is not intended for continuous human occupancy.
If the space is not meant for humans to work in, or the space is designed to hold something other than people, such as manholes, or tanks, then this space could count as a confined space.
The space is large enough for you to enter and work in
If a worker cannot fit their body into the space, they cannot be trapped inside.