1. (a) The rated load shall be legibly and permanently marked on a prominent location on the jack by casting, stamping, or other suitable means.
2. (b) All jacks shall be designed so that their maximum safe extension cannot be exceeded.
3. (c) Hydraulic jacks exposed to freezing temperatures shall be supplied with an adequate antifreeze liquid.
4. (d) In the absence of a firm foundation, the base of the jack shall be blocked. If there is a possibility of slippage of the cap, a block shall be placed in between the cap and the load.
5. (e) Employees shall not be permitted to enter the zone beneath a jack supported load unless it has been effectively blocked or cribbed.
6. (f) All jacks requiring periodic cleaning and lubrication, such as screw jacks, shall be properly cleaned and lubricated at regular intervals.

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

History

1. Amendment of subsection (f) filed 7-8-85; effective thirtieth day thereafter (Register 85, No. 28).

2. Amendment of subsections (e) and (f) filed 11-22-85; effective thirtieth day thereafter (Register 85, No. 48).