Seeking wisdom from those who have installed a lift

I install lifts for a living now ... got tired of selling things.

4" minimum for the concrete on a 10k or smaller lift . Just use a small bit to test depth somewhere nearby. You will feel the bit break through. Drill your anchor holes all the way thru in case you need move or mess with lift later. This allows you to pound the existing anchor bolts down and use new ones in same hole if needed . Stay 4-6" away from seems or cracks . If you hit rebar just be patient ... a good bit will bust through it . Sometimes we use epoxy if concrete depth is marginal or we are too close the a crack or seam.

Get your measurement dead on or your bridge will be hard to install and will tweek the columns when torqued and could make the yokes bind while raising .

4 posters are great for storing cars and work fine for maintenance if you have a rolling jack . Some are free floating and have little trolleys that allow you to move the lift around the shop .