The Complete Message:
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Carrier Structural system type A21 (in X / Y direction) is selected. Curtains Shearwalls should be used in A21 carrier structural systems. |
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The A21 carrier Structural system is defined in the earthquake code as buildings where all the effects of earthquakes are met with high ductility level reinforced concrete walls.
However, the curtain shearwall is not defined in the project.
Possible solutions:
Curtains Shearwalls should be added in the requested direction in accordance with the A21 carrier structural system in the project .
If a curtain 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.
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