[Code of Federal Regulations] [Title 30, Volume 1] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 30CFR56.16014] [Page 309] TITLE 30--MINERAL RESOURCES CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR PART 56_SAFETY AND HEALTH STANDARDS_SURFACE METAL AND NONMETAL MINES --Table of Contents Subpart O_Materials Storage and Handling Sec. 56.16014 Operator-carrying overhead cranes. Operator-carrying overhead cranes shall be provided with-- (a) Bumpers at each end of each rail; (b) Automatic switches to halt uptravel of the blocks before they strike the hoist; (c) Effective audible warning signals within easy reach of the operator; and (d) A means to lock out the disconnect switch.