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 https://www.osha.gov.

September 8, 1976

Mr. Kenneth Koning,
Loss Prevention Consultant
Liberty Mutual Insurance Company
6700 France Avenue, South
Minneapolis, Minnesota 55435

RE: Your letter dated August 6, 1976 - 1910.106, Flammable and Combustible Liquids

Dear Mr. Koning:

In 1910.106(d)(4), Design and construction of inside storage rooms, we find the following:

(i) Construction. Inside storage rooms shall be constructed to meet the required fire-restrictive rating for their use. Such construction shall comply with the test specifications set forth in Standard Methods of Fire Tests of Building Construction and Materials, NFPA 251-1969, etc.

The construction proposed by your assured must comply with the above cited requirements. Exposed steel trusses and metal decking is not rated as fire resistive construction.

When the room is constructed to comply with the above requirements, the restrictions of Table H-13 will still apply.

Please contact us if we can be of further service. You may call toll-free at 800-621-0523.

Very truly yours,



NICHOLAS DiARCHANGEL
Acting Regional Administrator
for Occupational Safety & Health