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Design wind pressures on Panels <br />Wind Uniform Lateral Load (psf): <br />ASCE 7-16, Chapter 30: <br />Risk Category = <br />Exposure Category = <br />Height above ground = ft <br />Enclosure Class = <br />Velocity pressure <br />qh = qz = 0.00256 KzKztKdKeV2 eqn (26.10-1) <br />Kz =Table 26.10-1 <br />Kzt = <br />Kd = <br />Ke =Conservative <br />Vd =mph <br />qh = psf <br />Design Wind Pressures <br />p = qh[GCp-Gcpi]C&C Design Wind Pressures, eqn (30.3-1) <br />GCpi =varies by zone, see below <br />GCpi = , table 26.13-1 <br />C&C Design Wind Pressures, Gable Roof (7 - 20 deg) <br />C&C Pressures <br />,GCp Gable Roof (7 - 20 deg) <br />,0.87 -24.71 ,17.53 wall corner zones (5) Fig. 30.3-1 <br />,0.87 -20.53 ,17.53 wall middle zones (4) Fig. 30.3-1 <br />,0.45 -53.08 ,10.52 roof corner zones (3)Fig. 30.3-2B <br />,0.45 -36.39 , 10.52 roof edge zones (2) Fig. 30.3-2B <br />,0.45 -36.39 , 10.52 roof middle zones (1) Fig. 30.3-2B <br />,0 -69.78 ,10.00 overhang corners (3) Fig. 30.3-2B <br />,0 -56.42 ,10.00 overhang middles (2 &1) Fig. 30.3-2B <br />ASCE 7-16, Sect. 29.4.4 (wind on solar panels): <br />A panel edge is exposed if within 0.5h =5.08 ft of roof edge <br />array edge factor γE =1.5 for uplift loads on panels occuring within 1.5 Lp from exposed edge <br />1.0 otherwise <br />Effecive wind area A = sf <br />pressure eq. factor γa =0.78 <br />psf <br />8.16 psf 8.16 psf at edge zones, edge factor = <br />II <br />C <br />10.16667 <br />Enclosed Building <br />p (psf) <br />0.85 <br />-1.3 <br />-1.05 <br />-3 <br />1.00 <br />0.85 <br />95 <br />16.69 <br />0.18 <br />1.00 <br />GCp <br />Worst case down <br />pressure (zone 2) = <br />-2 <br />-2 <br />-4 <br />-3.2 <br />Worst case uplift <br />(zone 2) = <br />-0.18 <br />15.46 <br />-28.23 <br />multiply by 1.5 for mount where edge panel > <br />5.08 ft from from roof edge for -42.34 psf <br />1.00 <br />Page 723-0816-PV 08/30/2023 <br />1005 N Evonda St <br />#211/7/2023