Least Likely to Crack or Spall
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Nigel Parkes is executive vice president at PNA Construction Technologies, Inc. He has more than 22 years of experience in the design and construction of concrete flatwork and is a voting member of ACI Committees 360, Design of Slabs on Grade, and 302, Concrete Floor and Slab Construction, among others. He may be reached via e-mail at nigel@pna-inc.com.
