Well, for what its worth..., I have a brand new concrete slab that I had poured for this project and it is beween four and five inches thick. I got seven of the wej-it anchors to bite, but not without upward travel before really locking into the concrete. I used a small piece of pipe and washer to set the anchors and got them to between ninety five and one hundred foot pounds of torque and the anchors that set solid, set just below the concrete. The anchors that did not set were the three at the back of the post on the drivers side. They did finally grab, however they were above the concrete. So for the mechanical anchors, there's a reason why on the wej-it web site they recommend at least five inches and change to work properly.
The problem is the lift is marketed needing a minimum of four inch concrete with anchors that will probably need at least five.
Has anyone here successfully set the provided anchors in four inch concrete?
My Epoxy anchors for the three that didnt bite are on the way!
Should have went with six inches of concrete..., but I figured five would be enough!