RC Slab
EN 1992-1-1 · one-way and two-way (strip method), per metre width
Slab
Opening in the slab (optional)
Set both to 0 for no opening. The opening is placed at the centre of the panel.
Materials and loads
All checks pass · 160 mm one-way slab · wEd = 11.18 kN/m²
Reinforcement
- Bottom, lx direction: Ø8 @ 100 mm (503 mm²/m)
- Bottom, distribution: Ø8 @ 275 mm (183 mm²/m)
3D view
Checks
- OKFlexure lx 503 ≥ 413 mm²/m
- OKMain bar spacing 100 ≤ min(3h, 400) = 400 mm [9.3.1.1(3)]
- OKShear (VEd ≤ VRd,c) 20.9 ≤ 71.0 kN/m
- OKDeflection (l/d) 30.5 ≤ 44.3
Calculation
Actions (per m²)EN 1990 6.4.3.2
| Self-weight | 25 h | 4.00 kN/m² |
| Design load wEd | Exp. 6.10 | 11.18 kN/m² |
Flexure: lx direction, sagging (simply supported)EN 1992-1-1 3.1.7, 9.3.1
| M | coefficient × w L² | 22.35 kNm/m |
| d | h − c − φ/2 (− inner layer allowance) | 131 mm |
| K | M / (b d² fck) | 0.0434 |
| z | d [0.5 + √(0.25 − K/1.134)] ≤ 0.95 d | 124 mm |
| As,req | M / (fyd z) | 413 mm²/m |
| As,min | max(0.26 fctm/fyk b d, 0.0013 b d) | 197 mm²/m |
| Provided | Ø8 @ 100 mm = 503 mm²/m |
Shear (no links)EN 1992-1-1 6.2.2
| VEd at d | coef · w L − w d | 20.9 kN/m |
| VRd,c | [CRd,c k (100 ρl fck)^(1/3)] b d ≥ vmin b d | 71.0 kN/m |
Deflection (span/depth)EN 1992-1-1 7.4.2
| K (structural system) | Table 7.4N | 1.00 |
| Allowable l/d | 44.3 | |
| Actual l/d | lx / d | 30.5 |
Scope: UDL, equal spans, coefficients valid for continuous slabs of ≥ 3 spans, strip method for two-way panels (conservative; corner torsion ignored), no punching shear (flat slabs). Results are an aid only and must be verified by a qualified, licensed engineer before use. National Annex presets are recommended values and must be checked against the official documents.