From an older post:
“US Jack is no longer rating their stands per stand, they are now rating them per pair. I emailed the company and got this reply which explains the change.
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Thank you for your interest in U.S. Jack Company and our 100% USA made hydraulic jacks and service/ lifting equipment.
The current standard that is correct is that all vehicle support stands (i.e. garage/ jack stands) must be used as a pair and must be rated per pair, and not rated per stand. A new standard, ASME PASE-2014 (Safety Standard for Portable Automotive Service Equipment), became effective 12/29/15 and made clear that the vehicle support stands can only be rated per pair and not per stand. It states: ‘Maximum load capacity per matched pair shall not exceed the rated capacity of the individual stand.’ The previous standards came from the ASME PALD-2009 and ASME ASP-2010 standards.
With that being said, the testing standards for manufacturers of vehicle support stands requires that each stand be capable of performing a proof load test at 200% of rated capacity for at least 10 minutes. In order to pass this proof load test, ’a permanent reduction in overall height, measured after the removal of the load, at the point of load contact shall not exceed 0.125 in.’
Before this new standard was made available for review and prior to becoming effective, U.S. Jack Company personnel assumed that because the proof load testing was done at 200% rated capacity for each individual stand, the rating of 3-Tons for example, was per stand and not per pair. This new standard made clear that the 200% proof load test has nothing to do with the rated capacity of the garage/ jack stands and that the two are independent of one another.
Because this is a safety standard, I think the ASME committee that created this new standard wanted to make clear that: 1) the vehicle support stands are only to be used as a pair, and therefore 2) are rated per pair and not per stand as they are never intended to be used individually. They have to be rated as a pair if they are only to be used as a pair.
For these reasons, U.S. Jack Company has had to change its previous position and statements that our garage/ jack stands are rated per stand to now they are rated per pair.
We have updated the instructions and parts sheet (attached) accordingly for these products to comply with this new standard. We have also updated our product information page on our website and most recent catalog publishing.
Please contact me with any questions, concerns, or if you need anything else.
Thank you,
Bradley Houseworth
Production Manager
Sent from my iPhone using Tapatalk”
