4 posts assemble easy and although I would never not bolt it to the floor its a good idea to bolt to the floor with concrete anchors. Unlike a 2 post lift, there isn't a minimum concrete thickness requirement, you can put it anywhere you have the space. If you are doing auto repairs, be warned the rolling jacks cost a fortune. A quality rolling jack will be more than an offshore 4 post lift. That being said, I really don't like the massive footprint a 4 post requires, it's only really good for parking, doing wheel alignments, or if you have an above ground dyno at home, lol.
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