More likely he meant "hi strength" concrete, 5000 psi or so. I believe that Autolifters specifies at least a 6" thick pad about 3' - 4' square for each post to evenly distribute the load. Dave Moore Bob Jasinski <rpjasin@xxxx> wrote: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] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. ============================= David Moore 203-949-1516 Want to pay off debts and retire early? Check out: http://mysuccess.quickpros.biz ============================= --------------------------------- Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now [Non-text portions of this message have been removed]