Laserfiche WebLink
1102015 Design Maps Detailed Report <br />Section 11.6 — Seismic Design Category <br />Table 11.6-1 Seismic Design Category Based on Short Period Response Acceleration Parameter <br />VALUE OF SDS <br />RISK CATEGORY <br />I or II <br />III <br />IV <br />SDS < 0.167g <br />A <br />A <br />A <br />0.167g:5 Sos < 0.33g <br />B <br />B <br />C <br />0.33g:5 SDs < 0.50g <br />C <br />C <br />D <br />0.5og 5 S's <br />D <br />D <br />D <br />For Risk Category = I and SDs = 0.605 g, Seismic Design Category = D <br />Table 11.6-2 Seismic Design Category Based on 1-S Period Response Acceleration Parameter <br />VALUE OF So, <br />RISK CATEGORY <br />I or II <br />III <br />IV <br />So, < 0.067g <br />A <br />A <br />A <br />0.0679:S So, < 0.133g <br />B <br />B <br />C <br />0.133g!5 SDi < 0.20g <br />C <br />C <br />D <br />0.20g:5 SD, <br />D <br />D <br />D <br />For Risk Category = I and S., = 0.605 g, Seismic Design Category = D <br />Note: When S, is greater than or equal to 0.75g, the Seismic Design Category is E for <br />buildings in Risk Categories I, II, and III, and F for those in Risk Category IV, irrespective of <br />the above. <br />Seismic Design Category =— "the more severe design category in accordance with <br />Table 11.6-1 or 11.6-2" = D <br />Note: See Section 11.6 for alternative approaches to calculating Seismic Design Category. <br />References <br />1. Figure 22-1: http:Hearthquake.usgs.gov/hazards/designmaps/downloads/pdfs/2010_ASCE-7_Figure_22-l.pdf <br />2. Figure 22-2: http://earthquake.usgs.gov/hazards/designmaps/downloads/pdfs/2010_ASCE-7_Figure_22-2.pdf <br />3. Figure 22-12: http://earthquake.usgs.gov/hazards/designmaps/downloads/pdfs/201O_ASCE-7_Figure_22- <br />12.pdf <br />4. Figure 22-7: http://earthquake.usgs.gov/hazards/designmaps/downloads/pdfs/201O_ASCE-7_Figure_22-7.pdf <br />5. Figure 22-17: http://earthquake.usgs.gov/hazards/designmaps/downloads/pdfs/2010_ASCE-7_Figure_22- <br />17.pdf <br />6. Figure 22-18: http://earthquake.usgs.gov/hazards/designmaps/downloads/pdfs/2010_ASCE-7_Figure_22- <br />1B.pdf <br />http:l/ehp2-earthquake.wr.usgs.govldesignmapsluslreport.php?template=minimal8latihide=37.79642&longitude=-121.20614&siteclass=4&riskcategory=0&ed b... 6/6 <br />