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
Guardrails on outside crane platforms. 1926.550(a)(13)(ii)
Point of Operation Guarding, As Applied To The Dvorak Model 314 Iron Worker. 1910.212
Guarding requirements for radial saws. 1910.213(h)(1)
Wheel locks on rolling scaffold. 1926.451
The discharge from exits in the Blackwill Burner Company plant. 1910.36, 1910.36(c)(1), 1910.36(c)(2)
A safety sleeve designed for guarding projecting shaft ends and a clarification of the term "safety sleeve". 1910.219
Structural steel angles for cleats on fixed ladders. 1910.27
The wearing of personal protective equipment. 1910.132
Guarding of Farm Field Equipment, Farmstead Equipment, and Cotton Gins. 1928.21, 1928.57
Testing of the WindGard. 1910.135
The issuance of a Program Directive to clarify the applicability fo OSHA standards. 1910.106
A request that the Automatic Nailing Machine be listed in 1910.217. 1910.217
Barricading Swing Radius of Backhoes. 1926.550, 1926.602
Information about outdoor wearing apparel to be provided by the employer. 1910.132
It is acceptable to use material other than fiber rope for boatswain's chairs. 1910.28(j)(2)
Clarification of a regulated area for battery type coke ovens 1910.1029(d)(2)(i)
Review of a decision in Secretary of Labor v. Churchill Truck Lines, Inc. 1910.136
Changing and Charging Storage Batteries. 1910.178
Proof testing, as a unit, certain types of alloy steel chain lifting devices. 1910.184
Clarification of 1910.67(b)(4)(i)(c). 1910.67