This Safe Work Permits eBook will cover important details of the following federal regulations, including definitions, key requirements, and exemptions (if any) to ensure safety compliance in the workplace.

  • 29 CFR 1910.146 Permit Required – Confined Spaces
  • 29 CFR 1926.1206 Confined Spaces in Construction
  • 29 CFR 1910.252 Welding, Cutting and Brazing (Hot Work)
  • 29 CFR 1910.147 Lockout / Tagout – The Control of Hazardous Energy
  • 29 CFR 1910 Subpart S Live Electrical Work Permit

Note: this eBook is not a comprehensive representation of all requirements outlined in OSHA regulations. For a complete listing of requirements and specifications for these regulations, please visit

Chapter 1: Permit Required – Confined Spaces


Under regulation 29 CFR 1910.146, the Occupational Health and Safety Administration (OSHA) requires employees to be protected from hazards associated with entering confined spaces.

An area qualifies as a permit-required confined space (PRCS) if it:

  • Is large enough for an employee to enter and work,
  • Has limited means of entry or exit,
  • Isn’t ideal or intended for extended occupancy, and
  • Contains at least one of the following:
    • A substance that can potentially engulf or suffocate the person inside
    • A potentially hazardous environment
    • Walls that converge inward or a sloped floor that tapers to a small cross section
    • Any other potential safety or health hazard

Typically, places like sewers, tanks, attics, closets, crawl spaces, and pits would constitute confined spaces, though you may encounter other examples on the job.

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