Concrete, March 1st, 2001
Deryk Simpson, the Concrete Advisory Service, discusses tolerances for suspended in-situ concrete slabs The topic of surface tolerances for concrete ground-supported floors has been well understood and specified since Technical Report 34 (TR34)(1) was first published in 1988. Further guidance on flatness was given in the 1997 supplement to this report(2). Recommendations on thickness tolerances for ground-supported slabs have been recently made by the author(3). However, judging by the enquiries received by the Concrete Advisory Service, tolerances on levels, flatness and thickness of suspend...
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