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Design summary <br /> <br /> Seismic loads for new HVAC units were evaluated, and existing framing was <br />verified for compliance. <br /> HVAC units are supported by 4×8 beams, with deflection utilization at 23% under <br />revised loading. <br /> These beams bear on 6×12 DF#1 cross members, analysed under two load <br />cases: <br />o Case 1: HVAC reactions — 98% deflection utilization <br />o Case 2: Roof loads (10 PSF dead + 20 PSF live) — 86% deflection <br />utilization <br /> The primary GLB girder (8¾″ × 42″) was checked for all point loads and found <br />adequate at 50% utilization. <br />