FAQs - US Seismic Design Tool
- How should batch mode data be formatted?
- What is the upper bound on the number of locations that can be handled by the Webtool batch mode?
- What does the error “Given lat/lon pair (lat/lon) failed to return data.” mean?
- Where can I find more information about the 2009 NEHRP Recommended Provisions and the ASCE 7-10 Standard?
- Which data sets are used to support this tool?
- Why have the 2008 USGS National Seismic Hazard Maps data changed from those included in the 2002 Maps?
- How has the 2008 hazard data update affected my results?
- For what grid spacing are the data reported?
- How are the acceleration values interpolated?
- With which building codes are the provided spectral acceleration values compatible?
- Why does the Webtool produce results that conflict with those given by the USGS Java Ground Motion Parameter Calculator? Which approach should govern?
- What is the significance of the 0.2 second and 1.0 second periods used in this Webtool?
- Why was this Webtool created?
