Steel Advisor

Suspended Slabs Flatness Tolerances

The tolerance limits in NZS 3114 have proved to be problematic for flooring contractors.

1 December 2020

The tolerance limits in NZS 3114 have proved to be problematic for flooring contractors. Actual practice has shown that the current New Zealand standards for concrete surface finish tolerances for suspended slabs are not achievable. This article considers what the current New Zealand standards for surface finish are and suggests what tolerances can be reasonably achieved. An alternative method of measuring surface finish tolerance is discussed which may offer a better alternative to the current tolerance provisions.

CMP1004.pdf

Kevin Cowie; Clark Hyland