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Oklahoma State University

Confined Spaces

A confined space is a space that meets the following criteria:

  • Is large enough and so configured that an employee can bodily enter and perform assigned work;
  • Has limited or restricted means for entry and exit (i.e., tanks, tunnels, vessels, silos, storage bins, hoppers, vaults, and pits);
  • Is not designed for continuous employee occupancy.

In order to provide a safe work environment in confined spaces, employees must know and apply safe work practice procedures, have available personal protective equipment and other protective equipment to insure their safety and receive appropriate training.

If you have any questions or concerns regarding confined spaces or confined space entry please contact EHS at 744-7241 or

Also refer to EHS’s Confined Space Manual (PDF) for appropriate procedures, university policy and requirements that must be followed when entering a confined space at OSU.


Useful Links:

OSHA: Permit-required confined spaces / 1910.146

OSHA: Permit-required Confined Space Decision Flow Chart

EHS: Entry Permit

EHS: Inventory Sheet

EHS: Contractor Notification

EHS: Training Requirements

EHS: Confined Space Entry Planning Worksheet