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<br />P N P E n g i n e e r i n g , I n c . <br />17671 Irvine Blvd., Suite 113, Tustin, CA 92780 949-351-5020 <br /> <br /> <br />June 3, 2024 <br /> <br /> <br />Mr. Daniel D. Kim <br /> <br />NCARB, LEED AP <br />Principal <br />Viniegra & Viniegra Architecture <br /> <br /> <br />CC: City Inspector <br /> <br />Project Name: ADU Project <br />Site Address: 1433 Cypress Avenue, Santa Ana, CA 92707 <br /> <br />This letter is intended to verify that, without soil report, minimum soil values were assumed <br />according to “minimum bearing capacity should be used in design if a soils report is not <br />available.” per IBC and CBC 2022. <br /> <br />Here is soil condition assumed for this job in case no soil report provided. This should qualify <br />what required per LABC and CBC 2022. <br /> <br />Soil Parameters for Footing Analysis: <br />(from Table 1806.2, Class of Materials – 5) <br /> <br />Vertical Foundation Pressure = 1,500 psf <br />Lateral Bearing Pressure = 100 psf/ft <br />Lateral Sliding Resistance, Cohesioin = 130 psf <br />It is the professional opinion of PNP Engineering Inc. that, minimum soil values can be used if <br />a soil report is not available for foundation design per CBC 2022. <br /> <br />If you have any questions, please let me know. Thank you for <br />your business. <br /> <br />Sincerely, <br /> <br /> <br /> <br />Joshua YJ Kang, P.E. <br />Principal <br />PNP Engineering, Inc. <br />949-351-5020