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This value can be set in Concrete setting by using Advanced level or in Concrete member data (advanced mode is ON).There are two possibilities:
| fctm | it means that mean tensile strength of concrete in time 28 days is taken into account, see picture below |
| fctm,fl | it means that the mean flexural tensile strength (EN 1992-1-1,clause 3.1.8(1)) is taken into account. This value should be used if restrained deformations such as shrinkage or temperature movements are taking into account for calculation crack width |
The value presented in material properties of concrete (picture above) is mean tensile strength of concrete in time 28 days. If cracking is expected earlier than 28 days, it is necessary input value fctm(t) in this time to material properties (EN 1992-1-1,clause 3.1.2(9)).