Brad,

I'd be very skeptical about any Ss value that low in St Louis. If you look at the seismic map from the IBC it shows some portions of the area from St. Louis to Memphis as having an Ss value of 3.00. You can get the exact Ss for a specific site by either talking with the site structural - who has to have that information to do their job - or by using the USGS program to determine the Ss value based on Lat/Long of an address.

That kind of information is going to be covered in the webinar tomorrow.
--

PARSLEY CONSULTING

Ken Wagoner, SET

760.745.6181 voice

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Brad wrote:
Any St Louis, Mo forumites happen to know if AHJ requires Ss greater than
0.95, so that Cp would be greater than 0.50?

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