Letters of Interpretation

OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed.

Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.

These letters of interpretation and the standards they address may not apply to OSHA State Plans. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or additional requirements. Please see OSHA-approved State Plans for more information.

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Date Title Standard Number
Policy regarding fall protection for steel erection operations 1926.105(a)
Acid gas cartridges containing hexavalent chromium. 1910.1200
Maintaining Workplace Acetylene Cylinders 1910.253
OSHA does not certify individuals or approve training programs for HAZWOPER. 1910.120
Outside, above ground, tanks used for storage of flammable and combustible liquids 1910.106
Required Frequency of Periodic Wire Rope Inspections for Lifting Equipment 1910.184(d), 1905.11
Fall Protection requirements for steel erection activities 1926.105(a), 1926.750
Information on ground fault circuit Interrupters 1926.404(b)(1), 1926.20(b)(2)
Specialized devices used to control mechanical power presses. 1910.217
Allowable tolerance for the height of guardrails 1926.451(a)(5)
Exxon's Baton Roughe Refinery Decision to Classify Marine Terminal Docks as Unclassified in Applying NFPA-NEC 1910 - Table of Contents, 1917.1, 1918 - Table of Contents
Respiratory Protection Under OSHA's Ethylene Oxide (EtO) Standard 1910.1047(g)
Use of Cranes to Lift Personnel in Drilled Pier Operations 1926.451, 1926.452(o), 1926.651(g)(2)(ii), 1926.550(g)(4)
Flashback Arrestors and Backflow Protective Equipment for Welding Operations. 1910.253
Roll-over protective-structures on Cary-lift loaders 1926.1000, 1926.1003
Injuries occurring to employees engaged in activities at a company picnic. 1904 - Table of Contents
Use of filler compounds to cover and conceal structural damage to Maritime Cargo Handling Gear 1917 - Table of Contents, 1918 - Table of Contents
DOT has jurisdiction of the trucking industry 1975.1
Motor vehicle accidents are not within OSHA's jurisdiction 1975.1
Multi-piece Rim Wheel. 1910.177