Laserfiche WebLink
GEOTECHNICAL <br />ENVIRONMENTAL <br />WATER RESOURCES <br />CONSTRUCTION SERVICES <br />COASTAL/MARINE GEOTECHNICS <br /> <br />2010 Crow Canyon Place, Suite 250  San Ramon, CA 94583  (925) 866-9000  Fax (888) 279-2698 <br />www.engeo.com <br /> <br /> <br />Project No. <br />5150.100.001 <br /> <br />January 20, 2023 <br />Latest Revision November 3, 2023 <br /> <br />Mr. Dan Yoon <br />7298 San Ramon Road <br />Dublin, CA 94568 <br /> <br />Subject: Hana Japan Steak House <br /> Pleasanton, Alameda County, California <br /> <br /> 2022 CBC SEISMIC DESIGN PARAMETERS UPDATE <br /> <br />References: 1. ENGEO. 2008. Geotechnical Report, Hana Japan Steakhouse, Pleasanton, <br />California. May 2, 2008. Project No. 5150.100.101. <br /> 2. ENGEO. 2008. Response to Review Comments, Dublin, California. <br />July 21, 2008. Project No. 5150.100.101. <br /> 3. City of Pleasanton. 2023. Memorandum, Subject: P22-0902, APN# <br />941-1710-10-1, 11991 Dublin Canyon Road (Hana Japan), Design Review. <br />May 11, 2023. <br /> <br />Dear Mr. Yoon: <br /> <br />As requested, we are providing updated 2022 California Building Code (CBC) seismic design <br />parameters for the Hana Japan Steak House in Pleasanton, California. The findings, conclusions, <br />and recommendations in the above-referenced documents remain valid for the proposed <br />development. <br /> <br />Both the 2019 and 2022 CBCs utilize seismic design criteria established in the ASCE/SEI <br />Standard “Minimum Design Loads and Associated Criteria for Buildings and Other Structures,” <br />(ASCE 7-16); therefore, the seismic design parameters will not change from the 2019 to the <br />2022 CBC. However, since the publication of the above-referenced report, Supplement 3 of <br />ASCE 7-16 was released. Therefore, we are providing updated seismic design parameters below <br />for Fv, SM1, and SD1. <br /> <br />Based on the subsurface conditions encountered, we characterized the site as Site Class D. <br />ASCE 7-16 requires a site-specific ground-motion hazard analysis for Site Class D sites with a <br />mapped S1 value greater than or equal to 0.2; however, Section 11.4.8 of ASCE 7-16 and <br />Supplement No. 3 provide an exception to this requirement. A site-specific ground-motion hazard <br />analysis is not required where the value of the parameter SM1 determined by Equation 11.4-2, and <br />shown in Table 1, is increased by 50 percent for developing the mapped Risk-Targeted Maximum <br />Considered Earthquake (MCER) spectral response, calculating SD1, and evaluating Cs in <br />accordance with Chapter 12 of ASCE 7-16. <br />