RC Slab Design (One-Way & Two-Way)

Ref: MS EN 1992-1-1:2010, Malaysia NA — Moment Coefficients per Table 3.14/3.15

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Msx = βsx × n × lx² | Msy = βsy × n × lx²

Ref: MS EN 1992-1-1:2010, Malaysia NA — Moment Coefficients per Table 3.14/3.15

n = 1.35Gk + 1.5Qk

ly/lx > 2 → one-way | ly/lx ≤ 2 �� two-way

As = M / (0.87·fyk·z) per m width

Span & Geometry

Short Span (lx) (m)

Clear span in shorter direction

Long Span (ly) (m)

Clear span in longer direction

Slab Thickness (mm)

Typical 125–250 mm

Concrete Cover (mm)

Typical 25 mm (XC1 indoor)

Bar Diameter (mm)

Typical 10 or 12 mm

Material

Concrete Strength (MPa)

25, 30, or 35 MPa

Steel Yield Strength (MPa)

500 MPa (H-bar, Malaysia)

Loading

Dead Load (incl. self-weight) (kN/m²)

Self-weight + finishes

Imposed Load (kN/m²)

Residential 1.5, Office 2.5

Support Condition

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.