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
03/25/1977	The standard was not intended to apply to properly constructed and equipped solid fuel salamanders which are fueled by coke or coal and are used in structures under construction.	1926.154, 1926.700
03/24/1977	"Massive release" is defined as gaseous vinyl chloride escaping under positive pressure; Clarification of the term "hazardous release";Clarification of protective clothing required to respond to a vi	1910.1017(b)(5), 1910.1017(i)(1), 1910.1017(h)
03/21/1977	The point of operation hazard on power brakes.	1910.212
03/09/1977	Shoring sides of trenches in hard or compact soil.	1926.652
03/08/1977	Wind Indicators and Rail Clamps.	1910.179
03/04/1977	Machinery and machine guarding.	1910.212, 1910.219
03/02/1977	OSHA standards covering hydraulic accumulators.	1910.106
03/01/1977	Installation of handrails on mobile belt loader conveyors.	1926.555(a)(8), 1910.261(a)(3)(v), 1910.265(c)(18)
02/25/1977	OSHA standards of exit requirements in steam tunnels.	1910.36
02/22/1977	Placement of structural members when assembling structural steel.	1926.751
02/22/1977	Mechanical Power Presses.	1910.217
02/21/1977	Newly Developed Hydrogen Storage Cylinders.	1910.101
02/16/1977	Colored location indicating lights.	1910.37
02/16/1977	Ground-fault circuit interrupter protection devices and their application.	1910.106
02/14/1977	Aisles and Passageways.	1910.22
02/11/1977	Fiberglass storage tanks for crude oil storage is acceptable.	1910.106(b)(1)(i)
02/10/1977	Plugging into an unprotected outlet with a portable GFCI would be in violation of the standard.	1926.401
02/03/1977	Double insulated tools on construction sites.	1926.400
02/03/1977	Interpretation on metal manhole ladder standards.	1910.268(h)(8)
01/26/1977	Guidance in relation to rules and regulations governing warehousing and transportation of powder-actuated tool cartridges.	1910.109

Letters of Interpretation

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