How many with a lift?

[TheJDMan]

how thick dose the floor need to be for this brand?

Since no one has answered, a four post lift can be used on any standard 4" to 6" thick concrete garage floor with no special requirements and most can be outfitted with caster wheels so they can be moved around easily. A two post lift will require dedicated concrete mounting pads that include anchor bolts in the floor to bolt it to. Once a two post is installed it cannot be moved. There are advantages and disadvantages to both designs.