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Confined Spaces

A confined space meets the following criteria:

  • Is large enough that an employee can enter and perform assigned work
  • Has limited or restricted means for entry and exit
  • Is not designed for continuous employee occupancy

To prevent unnecessary injuries and loss of life, OSHA enacted the Permit-Required Confined Spaces Standard in 1993, which requires that all confined spaces be identified and that a written program be generated to outline procedures for entry into confined spaces. In fulfillment of this responsibility, EHS has prepared the Oklahoma State University Confined Spaces Program and assists other departments in the development and implementation of confined space procedures for their areas. Procedures include but are not limited to training of designated employees, preparation and issuance of Entry Permits, and prevention of unauthorized entry.


Confined spaces include but are not limited to tanks, tunnels, vessels, silos, storage bins, hoppers, vaults, and pits. 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 to ensure their safety, and receive appropriate training. Refer to the Confined Space Manual for appropriate procedures, university policy, and requirements for entering a confined space at OSU.



Confined Space Decision Flow Chart

Confined Space Entry Permit

Confined Space Entry Planning Worksheet

Confined Space Inventory

Contractor Notification

EHS Confined Space Manual

Training Requirements


Useful Links

OSHA Confined Space Regulations

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