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Title: Establishing Thickness Tolerances for Parking Lot Slabs

Author(s): Eldon Tipping, Tim Manherz, Paul J. Beagley, Peter J. Ruttura, and Bruce A. Suprenant

Publication: Concrete International

Volume: 43

Issue: 7

Appears on pages(s): 25-35

Keywords: slab-on-ground, elevation, surface, subbase

Date: 7/1/2021

Members of ACI Committee 330 have questioned the applicability of ACI 117-10(15) tolerances for concrete slabs-on-ground (typically interior slabs with horizontal top and bottom surfaces) for sloped slabs-on-ground. The article discusses thickness variations evaluated for 32 slab-on-ground parking lot pavement placements. Based on the data, the authors propose thickness tolerances for adoption by Joint ACI-ASCC Committee 117 and ACI Committee 330.


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