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.
- 1910.155 - Clarification of incipient stage fire and interior structural fire fighting. - 12/02/1981
- 1910.155(c)(26) - Classification of fires; respiratory protection to extinguish fires. - 07/08/2002
- 1910.155(c)(26) - Interpretation of OSHA's Fire Brigade Standard concerning the use of SCBAs by incipient stage fire brigade members - 04/09/1990
- 1910.155(c)(27) - Whether inspections for portable fire extinguishers can be reduced from monthly to quarterly intervals. - 11/29/2006
- 1910.155(c)(3)(iv)(A) - NRTL Certification for New Product Design - [OSH Act of 1970 - Section 5(a)(1)] - 08/04/2021
- 1910.155(c)(41) - Actual live fire not necessary in "hands on" practice training - 07/02/1991