Beams: the minimum area of longitudinal reinforcement As,min
Eurocode 2 part 2: Design of concrete bridge structures 9.2.1.1 (1)
The area of longitudinal tension reinforcement should not be taken as less than As,min.
Recommendation
The recommended value for the minimum reinforcement areas is:
As,min = 0,26 (fctm / fyk) bt d ≥ 0,0013 bt d | (9.1N) |
Alternatively, for secondary elements, where some risk of brittle failure may be accepted, As,min may be taken as 1,2 times the area required in ULS verification.