Determining Seismic Design Category (SDC)
Seismic design categories of buildings are determined automatically according to Table 11.6-1 and 11.6-2, depending on the SDS and SD1 parameters defined in 11.5 and the risk category.
SYMBOLS
SD1 = Long period design spectral response acceleration parameter for 1 s
SDS = Short period design spectral response acceleration parameter
Seismic design category is determined automatically based on the short-period design spectral response acceleration parameter and long-period design spectral response acceleration parameter defined in 11.4.5 with risk category by the program.
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