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.

NOTICE:

How to Request a Letter of Interpretation

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Date Title Standard Number
An interpretation of 29 CFR 1910.67(c)(2)(v). 1910.67(c)(2)(v)
Safety devices on fixed ladders. 1910.27(d)(5)
Lathes, explosion proof motors and storage tank fill pipes. 1910.106(b)(4)(iv)(e)
The location of adequate toilet facilities. 1910.141(c)(1)(i)
Clarification of requirements for safety latches on lifting hooks. 1910.181(j)(2)(ii)
Clarification on maximum allowable load limits for cranes. 1918.74
1910.179(b)(4) only applies to outdoor storage bridge gantry cranes with spans over 100ft. 1910.179(b)(4)
Requirements when working with or around belt driven machines and motors. 1910.219, 1910.219(d)(1)
Standards with Identical Requirements. 1910.213
Point of operation guarding for cutters on milling machines. 1910.212(a)(3)(ii), 1910.212(a)(3)(iv)
Clarification of requirements that exit routes be maintained clear of all obstructions. 1910.36, 1910.37, 1910.37(a)(3), 1910.36(g)(2)
The cab entrance height of a log skidder. 1910.266(f)(3)(xiv)
Crawler cranes used in construction work and back-up alarms. 1926.550(b), 1926.602(a)
First Aid Training. 1910.151, 1910.151(b)
Definition of the phrase "Adequate ventilation" as used in 1910.178. 1910.178(g)(2)
Approval of lineman's safety belts and devices. 1910.268(g)(2), 1926.959(b)(7)
The diameter of standard pipe railings. 1910.23(e)(3)(ii)
Ladder trucks and tower trucks. 1926.453(b)(1)
Apparent Conflict Between the FOM and the Act. 1903.15(a)
Specifications for cages on fixed ladders. 1910.27(d)(1)