Sec. 1910.244(a)) of the OSHA General Industry covers jacks, i.e., appliances used for lifting, lowering or horizontally moving a load via application of a pushing force. Common forms of jacks include lever and ratchet, screw and hydraulic. Here’s a quick overview of the safety requirements for jacks.
Loading and Marking Requirements
Before using the jack, operators must make sure its jack rating, i.e., maximum working load it’s designed to lift safely throughout its specified amount of travel—up, down or sideways, is sufficient to lift and sustain the load.
The rated load of a jack must be legibly and permanently marked in a prominent location on the jack via casting, stamping or other suitable means.
The base of the jack must be blocked if there’s not a firm foundation. The block must be placed between the cap and the load where there’s a possibility of slippage of the cap.
The stop indicator must be kept clean at all times. The operator must watch the stop indicator to determine the limit of travel and ensure that the indicated limit isn’t overrun.
The load must be cribbed, blocked or otherwise secured immediately after it’s raised.
Hydraulic jacks exposed to freezing temperatures must be supplied with an adequate antifreeze liquid.
All jacks must be properly lubricated at regular intervals.
Each jack must be thoroughly inspected at times dictated by the service conditions and no less often than every 6 months for constant or intermittent use at one place;
Repair or replacement parts must be examined for possible defects. Jacks which are out of order must be tagged accordingly and not used until repairs are made.[fbcomments]