ACI: As recommended in the ACI 435R95 report (section 4.3.3),SAFE uses a default modulus-of-rupture value of 4√f 'c. PSI
For British, Hong Kong, Indian and Singapore Standards: Default modulus of rupture for cracked deflection is limited to 1 MPa or 0.55 MPa in short term and in long term deflection calculations, respectively.
For Australian and New Zealand codes: fr= 0.36√f 'c MPa
For Canadian code: fr= 0.3√f 'c MPa
Through manual overwrite by checking radio button of User Specified, users can comply with any other value based on engineering judgment or project requirements. This is done by selecting Define > Materials... > Modify/Show Material... as shown in Figure 1:
Figure 1 - Overwrite modulus of rupture