Re: DATA CLOSING Hello, a spectrum called DSD3 is defined in the "Design Spectrum States" section of the Structure Tree. Select this line and right-click on it. The project will be analyzed. -Earthquake regulation "TBDY 2007" has been selected in the analysis settings of your project. -The Building Height Class (BYS>=6) condition given in TBDY 2018 for unidirectional gear floors is not met. -UTL etc. It would be appropriate to define the curtains in the section as group curtains.