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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.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Amendment of section heading and section and new Note filed 5-8-95; operative 6-7-95 (Register 95, No. 19).