Letters of Interpretation | Occupational Safety and Health Administration

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.

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Date	Title	Standard Number
11/10/1993	Employees working on scaffolds and wearing of protective helmets.	1926.100
11/10/1993	Crane overload tests must be performed according to the manufacturers specifications and limitations	1926.550(a)(1)
11/09/1993	Spill containment of flammable or combustible liquids when a curb or earth dike is used.	1910.12, 1910.106(d)(6)(iii), 1926.152(c)(3)
11/04/1993	Locked exit doors are not permitted.	1910.36(b)(4), 1910.37(k)
11/04/1993	Hazard evaluation of mixtures containing established mutagens.	1910.1200
11/02/1993	Load testing of underhung trolleys/lifting devices.	1910.179(b)(2)
11/01/1993	The use of a crane near overhead power lines.	1926.550, 1926.416, 1910.132, 1926.95
10/28/1993	The soil classification system.	1926 - Table of Contents
10/28/1993	Lifting of personnel is a routine function of the crane.	1926.556(b)(2)(ix)
10/28/1993	Several OSHA injury and illness recordkeeping issues.	1904 - Table of Contents
10/28/1993	The concept of restricted work.	1904 - Table of Contents
10/26/1993	Fork-lifts in construction.
10/26/1993	Proper recording procedure for illnesses contracted outside of the United States.	1904 - Table of Contents
10/22/1993	Permit Required Confined Space Standard as it applies to certain operations.	1910.146
10/22/1993	Fall protection.
10/21/1993	Permit Required Confined Spaces Standard requires employers to retain canceled entry permits for at least one year.	1910.146
10/20/1993	Elevator repair and servicing.	1910.146
10/19/1993	OSHA Standard on Occupational Exposure to Bloodborne Pathogens.	1910.1030
10/15/1993	Summit's training program on confined space entry.	1910.146
10/15/1993	Who is required to wear the body harnesses and retrieval lines.	1910.146