[Cold Fusion]

I have the chance to buy a 12,000 pound 10'x6' bridge mill and I'm worried about the garage foundation. It's a 4" deep slab with steel mesh. I would be setting it up on the left side of the garage, with a minivan sometimes parked on the right side. It would be centered vertically, but not horizontally because the car needs to be able to get in. Is this going to cause a problem with shifting or even cracking? I figured that the load would be spread over 35 square feet with the cast iron base.