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.

Date	Title	Standard Number
05/04/1987	OSHA currently has no enforceable standard for paper dust.	1910.1000 TABLE Z-3
05/04/1987	Evaluation of labeling system which was designed to meet the requirements of the HCS.	1910.1200(f)
05/01/1987	DOL representation on the Interagency Committee an Seismic Safety in Construction.
04/24/1987	DOL representation on the Interagency Committee on Seismic Safety in Construction.
04/20/1987	"Longspan" refers to any joist or truss spanning 40 feet or more.	1926.751
04/14/1987	Use of Walkman Radio, Tape, or CD Players and Their Effect When Hearing Protection Is In Use	1910.95(i)(2)(i), 1910.95(i)(2)(ii)
04/07/1987	Use of eyeglass inserts or spectacle kits inside respirator full facepieces.	1910.134
04/07/1987	Employees engaged in erection, may ride a material hoist to gain access or egress to their work during the erection.	1926.552
04/01/1987	Applicability of 1910.95 to cotton gins.	1910.95
03/27/1987	Information regarding exposure to lead and sulfuric acid.	1910.1025
03/24/1987	Acceptance of closed-circuit self-contained breathing apparatus for firefighting.	1910.134
03/20/1987	Protection provided by powered air-purifying respirators.	1910.134(g)(1)(i), 1910.134(g)(1)(ii), 1910.134(g)(1)(iii)
03/18/1987	Calculating of hearing threshold shifts.	1910.95
03/16/1987	Applicability of 1910.180(b)(1) to cranes used with drag line, pile driver or clam shell attachments.	1910.180(b)(1)
02/26/1987	PCBs in fluorescent light fixtures.	1910.1000 TABLE Z-1
02/20/1987	Electrical Standards for Construction, Revised Subpart K	1926 Subpart K
02/18/1987	Use of amyl nitrite pearls as an antidote for acrylonitrile poisoning.	1910.1045
02/17/1987	OSHA has no standards for the design and implementation of video display workstations
02/11/1987	Information on Hydro Carbide Tungsten, otherwise known as cemented tungsten carbide with colbalt binder.	1910.120
02/01/1987	Interpretation on requirements for opening drums in a safe manner.	1910.120(j)

Letters of Interpretation

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