U.S. Seismic Design Maps

Building code reference document:

• 2012/09/06 International Building Code
• 2010/05 ASCE/SEI 7 Standard
• 2009/03 NEHRP Recommended Provisions
• 2009 AASHTO Guide Specifications for LRFD Seismic Bridge Design

Site address, or latitude and longitude
Soil classification (for example, Site Class C for "very dense soil and soft rock"; not available from the USGS)

Note, the application can batch-process multiple sites.

Summary Report: mapped location; and design values and response spectra from the building code reference document
Detailed Report: the calculations underlying the design values, including any associated maps, tables, and equations

• Regional Minimum and Maximum Design Values (Minimum and maximum S_S, S ₁, and PGA values for: 50 U.S. States; Washington, D.C.; 3,222 counties; and most ZIP codes)
• Data files of gridded values
• Mapped design values