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To: City of Santa Ana Building Department <br />Plans Examiner <br />Subject: Bryan Scott ADU <br />1145 S Shelton Street, #2 <br />Santa Ana, CA 92707 <br />APN: 013-061-14 <br />References: State approved general foundation plan for this project, dated 01/10/2024 <br />Orange Empire Foundation Requirements for Residential Projects and Accessory Structures, <br />Rev: 7/1/2024 <br />Architectural plan set for this project by US Modular, Inc., Rev: 11/22/2023 <br />To whom it may concern, <br />1. Since the footings are already designed to bear at 28" min. below finish grade, the 24" minimum <br />depth is met, embedded a minimum of 12" below the crawl space grade. I recommend installing <br />(2) continuous #5 rebars in the footing and (2) continuous #5 rebars in the top course of the stem <br />wall to meet the (2) #5 bars top and bottom, effectively creating 36" deep grade beams all <br />around. To add shear resistance and possible out of plane soil pressure resistance, I recommend <br />doubling the vertical bars by decreasing the spacing from 48" o.c. to 24" o.c. The stem wall shall <br />be 8" thick with solid grout. The footing shall be of 4,500 psi, type 5 cement, with a maximum <br />water : cement ratio of 0.45. The exterior side of the stem wall shall dampproofed and protected <br />with an additional 10 mil. poly vapor barrier. <br />2. The interior pad footings shall be 18" thick, embedded 18" below the crawl space grade, sized to <br />meet the required bearing area per the manufacturer's installation manual. Pad footings not more <br />than 24" square will not experience bending forces. Therefore reinforcement is not required. Pad <br />footing greater than 24" square shall have #4 bars at 8" max. o.c. each way, at 3" from the <br />bottom. <br />(951) 972-0769 <br />Principal Engineer <br />I have reviewed the referenced documents for this project. The referenced 800 sf manufactured ADU meets the <br />exception requirement no. 2 . Therefore I recommend construction per the installation manual and the <br />referenced general foundation plan set with the following comments and modifications to comply with the <br />referenced foundation construction requirements: <br />If you have any questions or concerns, please contact me at the number listed below. <br />Sincerely, <br />Neal G. Wanket, P.E. (CA RCE 68856) <br />October 21, 2024 <br />1145 S Shelton St <br />Unit# 24/22/2025