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
Request for Guidance Relative to Guardrail Requirements for Ladder Jack Scaffolds used on Construction sites. 1926.451
Procedural policy regarding elevated work platforms suspended from cranes or derricks used in general industry applications. 1910.28
Requirement for pump jack scaffolds. 1926.452(j)(7)
Access ladder for scaffolds. 1926.450
Anchors required for two-point suspension scaffolds. 1910.28(g)(11), 1910.66(e)(2)
Employees engaged in erection, may ride a material hoist to gain access or egress to their work during the erection. 1926.552
Attachment requirements for window washing equipment. 1910.28(a)(2), 1910.28(a)(4), 1910.28(a)(26), 1910.28(g)(9), 1910.28(j)(4), 1910.66, 1910.145(c)(3)
1926.451(i)(8) does not allow two or more employees to use a common lifeline. 1926.451(i)(8)
Standards for scaffolds do not prohibit the intermingling of scaffolding components. 1926.451
Testing requirements for the power units or manually operated winches of single-point adjustable suspension scaffolds. 1910.28, 1926.451
Applicability of 29 CFR 1926.451(a)(4). 1926.451
Clarification of 1926.451(c) concerning the intermingling of tube and coupler scaffold components. 1926.451
Clarification of our scaffold standards. 1926.451
"Rustgo Work Platform". 1926.451, 1926.452(w)
Requirements for scaffold plank. 1926.451
Fall protection for employees engaged in erecting or dismantling scaffolds. 1926.28
Fall Protection for Employees Engaged in Erecting or Dismantling Scaffolds. 1926.28, 1926.105
Fall Protection for employees engaged in erecting or dismantling scaffolds in the Construction Industry
Clarification and the applicability of regulations pertaining to exterior building work platforms used for window washing. 1910.28, 1910.66
Standard applicable to two point suspension scaffolds and power platforms used in window cleaning and to hazards in refrigeration plants. 1910.28, 1910.66, 1910.22, 1910.38, 1910.95, 1910.101, 1910.111, 1910.151, 1910.212, 1910.39