How does ideCAD define site classes, according to ASCE 7-16?
Site Class selection is made from the table according to the local soil class given in the site survey report prepared per ASCE 7-16 Table 20.3-1. If the site class is F, data is entered from the Analysis Settings / Response Spectrum tab.
When the site class is F, spectral acceleration parameters and site coefficients should be entered by users from the Response spectrum section in the analysis settings.