Seismic Design Category (SDC) per ASCE 7-16 with ideCAD

How ideCAD defines the seismic design category, according to ASCE 7-16?


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


The 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 ideCAD software.

 

SDS

I or II or III

IV

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

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