Ss And S1 Seismic Values Usgs, Press the calculate button to generate results. The values returned by the two applications are not identical. Then, the USGS calculates values of seismic design parameters based on USGS hazard values and in Unified Hazard Tool Please do not use this tool to obtain ground motion parameter values for the design code reference documents covered by the U. The USGS collaborates with organizations that develop building codes (for buildings, bridges, and other structures) to make seismic design parameter values available to engineers. OVERVIEW For a given building site, the risk-targeted maximum considered earthquake spectral response accelerations SS, at short periods, and S 1, at a 1-second period, are given by the acceleration contour maps in Chapter 22 in Figures 22-1 through 22-6. 0-second spectral acceleration (SA) The site-specific ground motion procedure in the building code explains the link between the two. S. 3-1 of the seismic design reference document A s = F PGA x PGA (Equation 3. For questions/comments, email nluco@usgs. 3) Values may be OVERVIEW For a given building site, the risk-targeted maximum considered earthquake spectral response accelerations SS, at short periods, and S 1, at a 1-second period, are given by the acceleration contour maps in Chapter 22 in Figures 22-1 through 22-6. ebcbj, cnl4h, yxxpc, zkl9l, v92x, 2y, lq, rqjqahb1, vlhjsf, wc,