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8/12/2015 Design Maps Detailed Report <br />JW Design Maps Detailed Report RECEIVEC,` <br />ASCE 7-10 Standard (37.93520N, 121.3082°W) AUG 2 4 2015 <br />Site Class D - "Stiff Soil", Risk Category I/II/III FNVIRONMENTA! . <br />r ��pT� �eoeQr��Gni1 <br />Section 11.4.1 — Mapped Acceleration Parameters <br />Note: Ground motion values provided below are for the direction of maximum horizontal <br />spectral response acceleration. They have been converted from corresponding geometric <br />mean ground motions computed by the USGS by applying factors of 1.1 (to obtain SS) and <br />1.3 (to obtain S1). Maps in the 2010 ASCE-7 Standard are provided for Site Class B. <br />Adjustments for other Site Classes are made, as needed, in Section 11.4.3. <br />From Figure 22-11'] <br />From Figure 22-2 [21 <br />Section 11.4.2 — Site Class <br />Ss = 0.943 g <br />S1=0.344g <br />The authority having jurisdiction (not the USGS), site-specific geotechnical data, and/or the <br />default has classified the site as Site Class D, based on the site soil properties in accordance <br />with Chapter 20. <br />Table 20.3-1 Site Classification <br />Site Class <br />vs N or N,,, s„ <br />A. Hard Rock <br />>5,000 ft/s N/A N/A <br />B. Rock <br />2,500 to 5,000 ft/s N/A N/A <br />C. Very dense soil and soft rock <br />1,200 to 2,500 ft/s >50 >2,000 psf <br />D. Stiff Soil <br />600 to 1,200 ft/s 15 to 50 1,000 to 2,000 psf <br />E. Soft clay soil <br /><600 ft/s <15 <1,000 psf <br />Any profile with more than 10 ft of soil having the <br />characteristics: <br />• Plasticity index PI > 20, <br />• Moisture content w >_ 400/c, and <br />• Undrained shear strength s. < 500 psf <br />F. Soils requiring site response <br />See Section 20.3.1 <br />analysis in accordance with Section <br />21.1 <br />For SI: lft/s = 0.3048 <br />m/s 1lb/ft2 = 0.0479 kN/m2 <br />http://ehp2-earthquake.wr.usgs.gov/designm aps/us/report.php?template=minima]&Jatitude--37.9352&Jongitude=-121.3082&siteclass=3&riskcategory=O&edibon... 1/6 <br />