Placing Tolerances

Unless tighter tolerances are specified, the following apply.

Spacing tolerances
To be used in conjunction with concrete cover tolerances below
Spacing of main bars in beams and columns ±10 mm
Distance between layers of main steel except it shall not be less than 25 mm ±5 mm
Distance between bars along the face of walls or slabs ±20 mm
Spacing of stirrups or ties in beams and columns ±20 mm
Longitudinal position of splice ±30 mm


Concrete Cover Tolerances
Tolerances of concrete cover relative to the values shows on the drawings and specifications.
In slabs and walls +10, -0 mm
In beams and columns +10, -0 mm
At ends of members +25, -0 mm

AS/NZS Standards documentation