# Beams: the minimum area of longitudinal reinforcement `A`_{s,min}

_{s,min}

## Eurocode 2 part 1-1: Design of concrete structures 9.2.1.1 (1)

The area of longitudinal tension reinforcement should not be taken as less than `A _{s,min}`.

## Recommendation

The recommended value for the minimum reinforcement areas is:

A = 0,26 (_{s,min}f / _{ctm}f) _{yk}b _{t}d ≥ 0,0013 b _{t}d | (9.1N) |

Alternatively, for secondary elements, where some risk of brittle failure may be accepted, `A _{s,min}` may be taken as 1,2 times the area required in ULS verification.