Archive Notice - OSHA Archive

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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. This 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. To keep apprised of such developments, you can consult OSHA's website at

March 23, 1976

Mr. J. P. Kellett
291 East Main Street
Clinton, Connecticut 06413

Dear Mr. Kellett:

This is in response to your letter dated February 1, 1976, which requests clarification on several questions concerning a construction project.

A review of the Occupational Safety and Health Standards by the Division of Occupational Safety Programming, has been completed. The following information is provided:

1. Link chains could be used provided they meet the following requirements.
(a) The rail is 42 inches nominal above the floor of the platform.

(b) It has a strength to withstand at least the minimum requirement of 200 pounds top rail pressure.

(c) Provides for a standard intermediate rail between the top rail and floor.

Reference: Occupational Safety and Health Standard. 29 CFR 1910.23(c)(1) and 1910.23(e), (v), (a), (b), (c), (d). page 23509 (copy enclosed).

2. Yes.

Reference: 29 CFR 1910.22(a)(2) page 23508.

3. In regard to your question on grounding, I can only refer you to the National Electrical Code, Article 250-Grounding. I suggest you contact a local electrical contractor and discuss your needs, as it is not clear what purpose you have for the grounding system.

Thank you for your interest in occupational safety.


John K. Barto, Chief
Division of Occupational Safety Programming