Standard garage floors are not made for a lift concrete is only 4" thick and 2000lbs, I put in 4X4X6 pads with rebar 3200lb concrete, I also have a cheap 9000lb Chinesium lift, been up and down a 100 times or more and it works awesome for what I have, even though it says 9000lbs I'd never go more than 7000lbs on it they won't hold up, just like any other Chiniseum **** don't push it farther than what it's capable of, also I have two jack stands I put one each end to stabilize it if I'm gonna do heavy duty work, don't need the arms flexing all the time because steel crystallizes over time and will eventually break...