Reinforced Concrete Design

Formulas, Codes, & Standards

Coefficient of resisting moment, Rn

Coefficient of resisting moment, Rn (Based on Reinforcement Ratio, ρ)

Reinforcement Steel Ratio, ρ

Required Reinforcement Steel Ratio, ρ

ß1 for f’c > 28 MPa

Maximum Reinforcement Steel Ratio (tension-controlled), ρ_max

Balanced Strain Condition

Lightweight Concrete: Modulus of Elasticity

Normal Weight Concrete: Modulus of Elasticity

Minimum Area of Steel Reinforcement: f’c <= 31.36

Minimum Area of Steel Reinforcement: f’c > 31.36

Minimum Bend Diameter