Standard Interpretations
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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.
- 1926.21 - Application of the multi-employer policy to particular construction standards. - 02/06/2012
- 1926.21 - Boilermakers rebuilding an incinerator in a clean area at a Superfund site - 06/14/1991
- 1926.21 - Certification of aerial lift operators. - 10/23/1992
- 1926.21 - Emergency medical services on construction sites - 03/02/2005
- 1926.21 - Information on temporary workers, particularly those in the electronic assembly industry. - 04/30/1996
- 1926.21 - Necessary precautions required to prevent entry into a swinging superstructure's radius. - 01/16/2003
- 1926.21 - OSHA standards addressing training for employees using personal fall arrest equipment. - 03/14/1995
- 1926.21 - OSHA Training Standards Policy Statements - 04/28/2010
- 1926.21 - Soil testing for excavations and confined spaces. - 06/15/1992
- 1926.21 - Welding and Noise in confined space - 01/06/1992
- 1926.21 - Willful violations for lack of general training in construction. - 08/18/1993
- 1926.21(b) - Exclusive use of videotape training for construction workers. - 08/03/1999
- 1926.21(b) - Necessary precautions required to prevent entry into a swinging superstructure's radius. - 01/16/2003
- 1926.21(b) - Necessary training for laser equipment operators. - 09/21/1992
- 1926.21(b)(2) - Application of the multi-employer policy to particular construction standards. - 02/06/2012
- 1926.21(b)(2) - Emergency medical services on construction sites - 03/02/2005
- 1926.21(b)(2) - English language proficiency at construction sites. - 07/26/2010
- 1926.21(b)(2) - HAZWOPER safety and health plan requirements for Phase I and Phase II environmental assessments. - 09/26/2002
- 1926.21(b)(2) - Necessary precautions required to prevent entry into a swinging superstructure's radius. - 01/16/2003
- 1926.21(b)(2) - OSHA requirements applicable to use of the Contex "Magic Arm" below-the-hook lifting device. - 01/25/2006
- 1926.21(b)(2) - OSHA requirements for individuals interested in employment as Heavy Equipment Operator. - 07/14/2016
- 1926.21(b)(2) - Policy for descent control devices used in construction. - 11/09/1998
- 1926.21(b)(2) - Safety procedures associated with the use of wheel or track propelled excavators. - 02/23/1994
- 1926.21(b)(2) - Training requirements for powder-actuated tools under §1926.302(e). - 03/10/2006