I believe the runway is 15" thick. Just curious how thick the runways are at Hartsfield?
I can't say for sure, but I remember when they built the new international ramp. The concrete they poured for the ramp / taxiway areas was about 2-1/2 feet thick reinforced with rebar. A couple years ago they redid runway 26L - 8R. The slabs they were hauling off in the dumptrucks were close to three feet thick...