Lawrence Jr said: <Since only 2 posts support the weight of the lift & car, a hi-pressure concrete floor is a must> I'm not sure where you heard this, but it simply is not true. My lift is installed on a standard 4"-5" (approx) slab with rebar, and I have no cracks or damage to the concrete after 12 years of use. I spoke with the mfr before I poured the slab and there was no mention of "hi-pressure" concrete. The footpads are good size and distribute the load well. Bob J [Non-text portions of this message have been removed]