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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.
SDS | I or II or III | IV |
|---|---|---|
SDS < 0.167 | A | A |
0.167 ≤ SDS < 0.33 | B | C |
0.33 ≤ SDS < 0.50 | C | D |
0.50 ≤ SDS | D | D |
SD1 | I or II or III | IV |
|---|---|---|
SDS < 0.067 | A | A |
0.067 ≤ SDS < 0.133 | B | C |
0.133 ≤ SDS < 0.20 | C | D |
0.20 ≤ SDS | D | D |
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