I have been looking in to get t a MaxJax lift. I have watched lots of videos and read quite a few posts on here regarding the concrete. I have seen some people dig up and pour a new slab, but a majority seem to make sure their slab is at least 4" and then drill away. Of course Danmar says 3000psi concrete is required with steel reinforcement. I would assume a large percentage of people have no idea what was used on their garage floor and I have read the minimum is 2500 psi so I am sure that is what most contractors use. So are people just assuming it is 3000 psi concrete or are they having some sort of test performed?
As far as steel reinforcement, I have a Zircon MT6 metal scanner and it finds metal in my floor and say it is about 3-4" deep, but sometimes it says it is ferrous metal and in other places it says it is non ferrous. So outside of the thickness being ok, I'm not really sure what my floor is.
As far as steel reinforcement, I have a Zircon MT6 metal scanner and it finds metal in my floor and say it is about 3-4" deep, but sometimes it says it is ferrous metal and in other places it says it is non ferrous. So outside of the thickness being ok, I'm not really sure what my floor is.


