By using the minimum reinforcement, the tensile stress, which was absorbed by the concrete before in the event of initial crack formation, should be covered by a reinforcement.
The minimum area of the longitudinal tension reinforcement is calculated according to EN 1992-1-1 [1] 9.2.1.1(1). The area of the reinforcement in tension or compression is limited acc. to Clause 9.2.1.1(3).