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Old 01-22-2013, 08:24 PM
turboawd turboawd is offline
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Join Date: Dec 2005
Location: midwest
Posts: 221
you making a parking spot?

i think the footprint would be different on concrete, since not the whole track face would be in contact with the surface. its different when in dirt, and the dirt gives and presses against the whole track face.

with that said, 4" should be good, as long as the base is good.
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