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Originally Posted by TButtrick
No experience but I'd imagine you'd really have to beef up the slab for this. All the weight of your car in a couple of square feet. A typical contractor grade won't do as even the double post needs 4+ inch slab. The 4 posts aren't an issue as I though they might be but I'm not working on a car underneath the lift but rather on the lift. If you're looking at single post with the large base then the base would be MUCH more of a nuisance than the the addition 3 posts. They look like twice the price.
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The punch through on the concrete would not concern me. It's the bending moment load that is trying to pull the anchor bolts out of the floor that I would worry about.
If I was going with this type of lift, I would also anchor it to the wall or ceiling just to be safe.
The other negative of this design is that the cross bar blocks off some of the access to the underside of the car.