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<br /> <br />1387 Calle Avanzado. San Clemente, CA 92673 949-391-6824 <br /> STRUCTURAL OPINION LETTER – PASS <br />11/4/2025 <br />Project: CLL03237 – Battery Cabinet Replacement <br />Site: 625 & 625 ¾ Grand Ave., Santa Ana, Orange County, CA, 92701 <br />Subject: Opinion on Proposed Battery Cabinet Relocation/Replacement (Antennas/RRUs Excluded) <br /> <br />Scope of this Opinion <br />This letter addresses only the new battery work shown in the proposed construction drawings dated June 10, <br />2025, for project CLL03237. The scope includes removal of twelve (12) existing batteries from a <br />decommissioned cabinet and installation of one new battery cabinet with a fully loaded weight of 2,300 pounds. <br />All antennas, radios, and mounts are specifically excluded from this opinion. <br /> <br />Existing Basis & Prior Modeled Weight <br />The most recent structural analysis for this site included a battery cabinet modeled at approximately 3,250 <br />pounds fully loaded. That configuration passed under the 2019 CBC / TIA-222-H design criteria and formed the <br />structural baseline for the equipment area. <br /> <br />Proposed Change (Weight Effect) <br />The new cabinet, at 2,300 pounds fully loaded, represents a reduction of roughly 950 pounds from the <br />previously analyzed cabinet weight. This results in lower gravity and seismic inertial demands on the <br />equipment platform and supporting structure compared to the prior design condition. <br /> <br />Code Basis for Current Work (Battery Cabinet Only) <br />The proposed cabinet and anchorage must comply with the currently adopted CBC/ASCE 7 provisions for <br />nonstructural components (Risk Category II, ASCE 7 Chapter 13). The design should confirm that anchor <br />spacing, embedment, and slab edge distances meet the required strength and deformation limits for the <br />cabinet’s mass and center of gravity. Wind load is not expected to govern since the cabinet is located within the <br />building equipment area. <br />