Beams: the minimum area of longitudinal reinforcement following the EN Eurocode recommendation, As,min
Eurocode 2 part 1-1: Design of concrete structures 188.8.131.52 (1)
The recommended value for the minimum reinforcement areas is:
|As,min = 0,26 (fctm / fyk) bt d ≥ 0,0013 bt d||(9.1N)|
- is the mean value of axial tensile strength of concrete at 28 days, see Table 3.1
- is the characteristic yield stress of reinforcement steel
- is the mean width of the tension zone; for a T-beam with the flange in compression, only the width of the web is taken into account in calculating the value of bt
- is the effective depth of concrete cross-section.
This application calculates the minimum area of reinforcement As,min from your inputs.