ASCC has published three new position papers: “Birdbaths on Concrete Slabs” (#7) explains why birdbaths are an unavoidable result of a flatness tolerance. “Bugholes in Formed Concrete” (#8) deals with acceptance of formed concrete surfaces. “Slab Thickness Tolerances” (#9) cites statistical data from as-built slabs and concludes that tolerances for slab thickness, as defined in ACI 117-90, are not realistic.
“The position papers deal with issues that constantly cause concern for concrete contractors,” says D. Thomas Ruttura, ASCC president. “We’re often held responsible for circumstances beyond our control. The better we can explain to designers and specifiers what can and cannot be expected from concrete, the more likely we are to have a successful project.”
Copies of the position statements may be ordered by calling (866) 788- 2722 or by e-mail at [email protected].