California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 14 - Petroleum Safety Orders-Drilling and Production
Article 23 - Erection of Derricks and Masts
Section 6583 - Hydraulic Lifts for Derricks and Masts

Where hydraulic lifts are employed to raise or lower a derrick or mast between the horizontal and vertical positions, or to raise or lower the top telescoping section of a derrick or mast, the hydraulic fluid system shall be equipped with a device located within the cylinder, or as closely connected to the cylinder as is feasible, to prevent either section descending at an uncontrolled rate of speed if the fluid piping system fails. This may be accomplished by the use of an excess flow device, a restricting orifice, or other equally effective means.

1. Amendment of section heading and section and new NOTE filed 5-8-95; operative 6-7-95 (Register 95, No. 19).

Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.