Reinforced Concrete Beam Capacity Formula
The nominal moment capacity of a reinforced concrete beam.
Formula
Mn = As · fy · (d - a/2)
Discipline: Civil Engineering. Result unit: N·m.
Variables and units
- Mn — Moment Capacity (N·m): Nominal moment capacity
- As — Steel Area (m²): Area of tension reinforcement
- fy — Steel Yield Stress (Pa): Yield stress of steel
- d — Effective Depth (m): Effective depth of beam
- a — Equivalent Stress Block Depth (m): Depth of equivalent stress block