Arizona Revised Statutes Title 27. Minerals, Oil and Gas § 27-344. Timbering support

A. Minimum standards for proper timbering or other ground support of any working place shall be suitable to the conditions of the mining system. When necessary such standards shall be set by the inspector after consultation with the operator involved.

B. When any working place has dangerous or hazardous ground no work shall be done there except as shall be necessary to make the place secure and safe. If for any reason necessary timbers cannot be supplied immediately, all work done shall cease until such timbers can be supplied.

C. “Timber” as used in this section shall mean wood, steel, concrete, rock bolts, sand fill, rock fill or any other material or device used for bracing, supporting or restraining ground.