- Safety and Health Topics
- Confined Spaces
Standards and Enforcement
Visit the Confined Spaces in Construction - Final Rule Page for information on the final rule.
This section highlights OSHA standards, directives (instruction to OSHA staff), letters of interpretation (official letters of interpretation of the standards), and national consensus standards related to confined spaces.
General Industry (29 CFR 1910)
- 1910 Subpart H, Hazardous materials
- 1910.124, General requirements for dipping and coating operations
- 1910 Subpart J, General environmental controls
- 1910.146, Permit-required confined spaces
- Appendix A, Permit-required confined space decision flow chart
- Appendix B, Procedures for atmospheric testing
- Appendix C, Examples of permit-required confined space programs
- Appendix D, Confined space pre-entry check list
- Appendix E, Sewer system entry
- Appendix F, Rescue team or rescue service evaluation criteria (Non-mandatory)
- 1910 Subpart Q, Welding, cutting, and brazing
- 1910.252, General requirements
- 1910 Subpart R, Special industries
Shipyard Employment (29 CFR 1915)
- 1915 Subpart B, Confined and enclosed spaces and other dangerous atmospheres in shipyard employment
- 1915.11, Scope, application, and definitions applicable to this subpart
- 1915.12, Precautions and the order of testing before entering confined and enclosed spaces and other dangerous atmospheres
- 1915.13, Cleaning and other cold work
- 1915.14, Hot work
- 1915.15, Maintenance of safe conditions
- 1915.16, Warning signs and labels
- 29 CFR Part 1915, Subpart B, Confined and Enclosed Spaces and Other Dangerous Atmospheres in Shipyard Employment. CPL 02-01-051, (May 20, 2011). Provides current policy, inspection procedures, information and guidance to ensure uniform enforcement of the 29 CFR Part 1915, Subpart B standard.
Letters of Interpretation
- Controlling Confined Space Hazards in Deep Tanks for Parts Cleaning. (May 8, 2012).
- Retrieval Lines Tied to Rescuers Entering a Confined Space. (November 21, 2011).
- Clarification of "continuous forced air ventilation" for PRCS entry work. (November 17, 2005).
Note: These are NOT OSHA regulations. However, they do provide guidance from their originating organizations related to worker protection.
American National Standards Institute (ANSI)/American Society of Safety Engineers (ASSE)
- Z117.1 - 2009, Safety Requirements for Confined Spaces