Crack Width Control SLS (EC2)

Ref: MS EN 1992-1-1:2010, Clause 7.3.4, Malaysia NA

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wk = sr,max · (εsm − εcm)

Ref: MS EN 1992-1-1:2010, Clause 7.3.4, Malaysia NA

SLS crack control (EC2 Cl. 7.3.4): Cracked section analysis (elastic) for σs. k₁ = 0.8 (deformed bars), k₂ = 0.5 (bending), k₃ = 3.4, k₄ = 0.425. wmax = 0.3 mm for most Malaysian exposures (XC2–XS3).

Section Geometry

Section Width (mm)

Beam or slab width

Section Total Depth (mm)

Overall section depth

Effective Depth (mm)

h − cover − bar radius

Reinforcement

Tension Steel Area (mm²)

Total tension reinforcement area

Bar Diameter (mm)

Dominant tension bar diameter

Nominal Cover to Bar (mm)

Cover to outer face of tension bar (not to link)

Materials & Loading

Concrete Strength (MPa)

25, 30, 35, or 40 MPa

SLS Bending Moment (kN·m)

Frequent or quasi-permanent combination

Load Duration (kt)

Crack Width Limit wmax (EC2 Table 7.1N)

Steel stress σs

—MPa

Engineering aid only — final design must be endorsed by a registered PE under BEM.

Max crack spacing sr,max

—mm

Engineering aid only — final design must be endorsed by a registered PE under BEM.

Calculated crack width wk

—mm

Engineering aid only — final design must be endorsed by a registered PE under BEM.

Disclaimer: This output is an engineering calculation aid only and does not constitute a final or endorsed design. All designs submitted to Malaysian authorities must be endorsed by a registered Professional Engineer (PE) under the Board of Engineers Malaysia (BEM) in accordance with the Registration of Engineers Act 1967.