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Project: Proposed ADU Sheet 4 <br />Address:2121 LEWIS ST AND 2121 LEWIS ST #2 Job No.2025-7 <br />SANTA ANA, CA 97206-2236 Date: <br />A. DESIGN CRITERIA <br />A.1 Building Description <br />This calculation is for the analysis and design of the proposed ADU. <br />This calculation will show the checking of Wind and Seismic Load Design. <br />Wood diaphragm and Wood Framing as LFRS is included in this calcs. <br />The analysis is limited to the new SW and Diaphram Calcs, but the whole bldg will be analyze for <br />Base Shear and Diapghram load <br />A.2 Codes <br />1. 2023 California Residential Code & CBC; and local agency ammendment <br />2. ACI, Building Code Requirements for Reinforced Concrete 318 <br />3. ASCE 7 (For Seismic Design Criteria) <br />4. National Design Specifications, (For Lumbers) <br />A.3 Materials <br />1. Concrete fc’=2500 psi at 28 days <br />2. Steel Reinforcement Grade 60 ASTM A615 <br />3. Structural Lumber: Douglas Fir, WCLIB Grading Rule #18, Grade 1 <br />3.1 Beam: Douglas Fir, WCLIB Grading Rule #18, Grade 1 and better <br />3.2 Column/Post: Douglas Fir, WCLIB Grading Rule #18, Grade 1 <br />3.3 Rafter: Douglas Fir, WCLIB Grading Rule #18, Grade 1 <br />4. Steel Bolts ASTM A325 <br />A.4 Soils Report : <br />No Soils Report Available. <br />Use Least Allowable Bearing Pressure = 1,500 psf (per CBC) <br />KM Associates Inc Structural Calculation Sheet <br />5/27/2025