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• Standard Number: 1910.23(e)(3)(ii)

January 21, 1976

Mr. F. Ward Hendee
Chief Draftsman
Vermont Structural Steel, Corp.
P.O. Box 610 207 Flynn Avenue
Burlington, Vermont 05401

Dear Mr. Hendee:

This is in response to your letter dated December 2, 1975, and confirms the telephone conversation between Mr. Barnier and a member of my staff concerning the diameter of standard pipe railings (29 CFR 1910.23(e)(3)(ii)).

The meaning of "nominal diameter" is explained in OSHA Program Directive #100-4 (copy enclosed) dated March 23, 1972. A "standard 1 1/4 inch 0 pipe (O.D. 1.660 inches)" meets the size requirements for pipe used in the construction of guard rails.

If I may be of any further assistance, please feel free to contact me.

Sincerely,



John K. Barto, Chief
Division of Occupational Safety Programming

Enclosure

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