Standard Interpretations
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.
- 1910.66 - A proposed exterior building maintenance program. - 06/19/1981
- 1910.66 - Anchoring 2-point suspension scaffolds;criteria for testing anchorages. - 08/10/2000
- 1910.66 - Attachment requirements for window washing equipment. - 12/09/1986
- 1910.66 - Clarification of Power Platforms for Exterior Building Maintenance. - 03/18/1982
- 1910.66 - Clarification of what constitutes lashing or stability for portable scaffolds. - 08/10/1976
- 1910.66 - Force factor for fall arrest systems - 10/01/1991
- 1910.66 - Inability to rig service platforms at the roof level. - 06/16/1988
- 1910.66 - Powered Platform Installations for Building Maintenance - 12/03/1991
- 1910.66 - Powered platforms for building maintenance to "a permanently installed suspended scaffold." - 12/15/1992
- 1910.66 - Powered platforms for building maintenance. - 07/05/1995
- 1910.66 - Powered platforms permanently dedicated for building maintenance standard. - 07/15/1997
- 1910.66 - Requirements contained in OSHA Instructions STD 1-3.3. - 07/11/1983
- 1910.66 - Tie-in guides standard. - 01/06/1992
- 1910.66(b)(1) - Modification of powered platforms for building maintenance and applicability of IWCA 14.1-2001 and ASME A120.1-2001. - 07/06/2006
- 1910.66(b)(2) - Modification of powered platforms for building maintenance and applicability of IWCA 14.1-2001 and ASME A120.1-2001. - 07/06/2006
- 1910.66(b)(2)(i) - Modification of powered platforms for building maintenance and applicability of IWCA 14.1-2001 and ASME A120.1-2001. - 07/06/2006
- 1910.66(b)(2)(ii) - Modification of powered platforms for building maintenance and applicability of IWCA 14.1-2001 and ASME A120.1-2001. - 07/06/2006
- 1910.66(c) - Tie-in guides for platform stabilization. - 06/02/1992
- 1910.66(e)(2) - Anchors required for two-point suspension scaffolds. - 07/16/1987
- 1910.66(e)(2) - Powered platforms: Suspension height limits for transportable outriggers. - 10/01/1998
- 1910.66(e)(2)(i) - Demonstrating equivalency for powered platform tie-in guides. - 06/10/1998
- 1910.66(e)(2)(iii) - Demonstrating equivalency for powered platform tie-in guides. - 06/10/1998
- 1910.66(e)(2)(iii) - Tie-in guides for platform stabilization. - 06/02/1992
- 1910.66(e)(2)(iv) - Tie-in guides for platform stabilization. - 06/02/1992
- 1910.66(e)(3) - Inspections required for powered platforms for exterior building maintenance. - 08/25/1975
- 1910.66(f)(3)(i)(C) - Proper wheel radius in manually propelled carriage to comply with 40 pound limit for horizontal force - 03/07/1991
- 1910.66(f)(3)(ii) - Powered platforms: Suspension height limits for transportable outriggers. - 10/01/1998