Shearwall should be used for A13.

The Complete Message:

The A13 structural system is defined in the earthquake code as buildings where all earthquake effects are met with high ductility level non- void reinforced concrete walls.

However, the shearwall is not defined in the project.

Possible solutions:

• Shearwalls should be added in the requested direction in accordance with the A13 structural system in the project .

• If a shearwall will not be used in the structure, in the Analysis Settings / TBDY 2018 Earthquake Code Wizard, A11 for High Ductility Level Systems and A31 for Systems with Limited Ductility Level can be selected.