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Allowance in design for deviation for the concrete cover: the value of Δcdev under controlled conditions

Eurocode 2 part 1-1: Design of concrete structures   4.4.1.3 (3)

In certain situations, the accepted deviation and hence allowance, Δcdev, may be reduced.

Recommendation

The recommended values are:

- where fabrication is subjected to a quality assurance system, in which the monitoring includes measurements of the concrete cover, the allowance in design for deviation Δcdev may be reduced:

10 mm ≥ Δcdev ≥ 5 mm (4.3N)

- where it can be assured that a very accurate measurement device is used for monitoring and non conforming members are rejected (e.g. precast elements), the allowance in design for deviation Δcdev may be reduced:

10 mm ≥ Δcdev ≥ 0 mm (4.4N)

National choice

Δcdev
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[mm]
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