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Fire-resistant coating for aboveground tank saddles

Summary A company asked how to apply OSHA's fire-resistant coating rule to supports under an aboveground tank. OSHA said the saddle height is measured from the lowest point in the middle of its curve to the ground or supporting surface. If that distance exceeds 12 inches, the saddle requires fire-resistant coating; if it is less than 12 inches, the coating is not required.
Document
Federal opinion letter
Agency
Occupational Safety and Health Administration (OSHA)
Document number
1975-07-25
Date issued
July 25, 1975
Status
Active
Status last verified October 10, 2026

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July 25, 1975

John Pirong
Clement and Co., Inc.
[Recipient address omitted]

Dear Mr. Pirong:

This is in response to your letter requesting clarification of the OSHA Standard 1910.106(b)(5)(ii), page 23614 of Federal Register dated June 27, 1974.

A saddle has been described as a support device curved to fit the tank contour which may or may not be attached to legs. The measurement of the saddle to its lowest point would come in the middle of the curve. If it exceeds twelve inches to the ground or surface, the Standard requires that it be protected with a coating of fire resistive materials. Such coating is not required if the distance is less than twelve inches.

Please feel free to contract us if there are further questions about OSHA.

Sincerely,

Alfred Barden
Assistant Regional Director
Occupational Safety and Health

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