X2 on quality vapor barrier and rebar. I used 6” of concrete as was specified by the 12k 2- post lift I put in. Had the lift location determined so not to run the radiant under the lift columns. I placed conduit run under the slab for power to the lift and pulled an extra circuit for 120V...
I put an Atlas 12k in my pole barn and have been very happy with it. You can pick up some extra tall jacks to support vehicles(Jeep frame rust. The 2-post also allowed me to pick a 4000lb mill off a trailer.
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