Calculation of concrete nominal cover to reinforcement

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Concrete characteristic strength

f_ck

MPa

e.g. 30 MPa for concrete class C30/37. For a list of concrete classes see Table of Concrete Design Properties

Type of reinforcement / tendon

Maximum diameter of reinforcement / tendon

Environment exposure class

Exposure classes related to environmental conditions in accordance with EN 206-1 as specified in EN1992-1-1 Table 4.1

Design working life

years

Design working life of 50 years corresponds to structures of average importance.

Member with slab geometry

True if position of reinforcement is not affected by construction process, such as in slabs without link reinforcement.

Concrete cast against uneven surface

Special quality control of the concrete production

Nominal aggregate size greater than 32 mm

Allowance for deviation to calculate nominal cover

Δc_dev

According to EN1992-1-1 §4.4.1.3(1), §4.4.1.3(3) and the National Annex. A value different than 10 mm may be appropriate for certain cases according to the National Annex (e.g. precast elements).

Nationally Defined Parameters

Nationally Defined Parameters corresponding to EN1992-1-1 sections 4.4.1.2(3), 4.4.1.2(5), 4.4.1.2(6), 4.4.1.2(7), 4.4.1.2(8), 4.4.1.2(13), 4.4.1.3(4).

Inspection level (Denmark National Annex)

The inspection depending on inspection levels is specified in prEN 13670, where Execution Class 1 corresponds to the relaxed inspection level, Execution Class 2 corresponds to the normal inspection level, and Execution Class 3 corresponds to the tightened inspection level.

Maximum equivalent water-to-cement ratio (Sweden National Annex)

vct_ekv

Maximum equivalent water-to-cement ratio used in concrete composition, corresponding to vct_ekv in the National Annex of Sweden, Table 4.4N. Larger values are more unfavorable.

Adequate cement content (Spain National Annex)

Adequate cement content according to National Annex of Spain for EN1992-1-1 Section 4.4.1.2(5).

Note: Always verify the validity of the Nationally Defined Parameters. Please inform us of any discrepancy using our Contact Form

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Eurocode 2 Concrete nominal cover for reinforcement and prestressing steel