According to TBDY 2018 Table 3.2, the program automatically chooses the Seismic Design Category (DTS).

The earthquake design class in TBDY 2018 is determined in Table 3.2 .

SDS is calculated in the design spectrum sheet . In the next stage, BKS has been determined.

For BKS, the corresponding DTS value for the interval where the SDS value remains is automatically selected by the program.