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.

January 3, 1989

Mr. Bransford Pickett
Rigging Engineer
National Steel and Shipbuilding Company
P.O. Box 85278
San Diego, California 92138

Dear Mr. Pickett:

This in response to your letter of December 7, 1988, concerning the "Rated Load Test" for cranes as specified at 29 CFR 1910.179(k)(2).

Overhead and gantry cranes should not be rated in excess of 80 percent of the test load. Therefore, in order to rate a crane to 100 percent of the design intended loading, the test load must be 125 percent of the rated load. The only exception to this requirement would be when a crane manufacturer specifies a different test loading criteria. In that case, the crane manufacturer's procedures shall be adhered to.

If we may be of further assistance, please contact us.


Thomas J. Shepich, Director
Directorate of Compliance Programs

December 7, 1988

U.S. Department of Labor
Mr. Thomas J. Shepich
Director, Compliance Programs 200 Constitution Ave.
Washington, D.C. 20210

Attn: Mr. Thomas S. Shepich:

Paragraph K2, part 1910.179, Title 29, specifies the upper limit of a Rated Load Test shall not exceed 125% of the rated load unless otherwise recommended by the manufacturer. Please specify wheat minimum load below 125% of the rated load is permissible in the rated load test, since none is specified in K2, 1910.179, Title 29.

Reference K2, 1910.179, Title 29.

Bransford Pickett
Rigging Engineer