See Response Spectrum Code Function Definition Form for details about using the form. The parameters for this code are as follows:
Ss and S1 from USGS by Lat/Long
Ss and S1 from USGS by postal code
Ss and S1 User specified
Site Class = A to F
Access the Response Spectrum NCHRP 20-07 Function Definition form as follows:
Click the Loads > Functions Type > Response Spectrum > Expand arrow command, or on the Bridge Wizard click the Response Spectrum Functions item and click the Define/Show Resp Spec Funcs. button, to display the Define Response Spectrum Functions form. Then do one of the following:
Alternatively, click the Loads > Functions Type > Time History > New command and select NCHRP 20-07 from the resulting form.
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