RCC One-Way Slab Design
Structural IS 456:2000~3 min
Design a one-way RCC slab for bending and check deflection as per IS 456:2000.
Formula
Ast = Mu / (0.87 × fy × (d - 0.42 × xu))
Input Parameters
Results
Factored Load (wu)
9.75kN/m²
Design Moment (Mu)
19.50kN·m/m
Required Effective Depth
75mm
Steel Area (Ast)
663mm²/m
Step-by-Step Method
- 1Calculate factored load wu = 1.5 × (DL + LL).
- 2Design moment Mu = wu × L² / 8 (simply supported).
- 3Required depth d = √(Mu / 0.138 × fck × b).
- 4Calculate Ast from moment equilibrium.
Engineering Notes
- •Minimum slab thickness: L/20 for simply supported, L/26 for continuous.
- •Minimum Ast = 0.12% of bD for Fe500 (IS 456 Cl. 26.5.2.1).
- •Distribution steel = 0.12% of bD.
Code Reference
IS 456:2000
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