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29.4.3 Rooftop Solar Panels for Buildings of All Heights with Flat Roofs or Gable or Hip Roofs with Slopes Less Than 7° h = 15ft mean roof height above ground, in ft h1 = 1 ft Solar Panel Height above roof at low edge, in ft h2 = 1.5ft Solar Panel Height above roof at raised edge, in ft hpt = 0 ft Mean parapet height above adjacent roof surface, in ft A = 5.22 sf Effective Wind area for structural element being designed, in ft2 a = 30 ft Distance to measure roof zones d1 = d2 =  E = 1.5 d1 to the adjacent array > max(4h2, 4 ft), or d2 to the next adjacent panel > max(4h2, 4ft) WL = 60 ft Width of overall longest side, in ft WS = 50 ft Width of overall shortest side, in ft GCrn= Net pressure coefficient, equal to pE((GCrn)nom(c)) (GCrn)nom= Nominal Net pressure coefficient lp = 3.25ft Chord length of solar panel, in ft perpendicular to edge lmodule = 4 Module chord length (trib W) Wmodule 2.705 Module length (1/2 panel) c 0.8 Panel chord length factor, max(0.6+0.06lp,0.8) For 5o <  < 15 o , apply c only to 15o - 35 o (GCrn)nom figure values and prior to interpoating p 0.9 Parapet height factor, equal to min(1.2,0.9+hpt/h)  0 Angle of plane of roof from horizontal, in degrees  10 Angle of plane of panel to roof, in degrees Determine Lb Lb= 0.5*sqrt(hWL), but need not exceed h or Ws, in ft Lb= 15.0 ft, not to exceed 15 or 50 ft Lb= 15.0 ft Determine Roof Zones 2h 30 ft: Roof zone 2 and 3 setback (indicated by the dotted lines on Figure 3) Panels located beyond 30 ft setback are located in Roof Zone 1 . Effective Wind Area (A) of attachment or ballast: A = lmodule*Wmodule = 4 ft x 2.705 ft A = 8.79 sf Calculate the Normalized Wind Area (An) An = (1000/(max(Lb, 15ft))2)*A =(1000/(15ft)^2)*8.79 sf An = 39.07 sf ASCE 7-16 For rooftop solar array, horizontal distance orthogonal to the panel edge to an adjacent panel or the building edge, ignoring any rooftop equipment in Fig. 29.4-7, in ft For rooftop solar arrays, horizontal distance from the edge of one panel to the nearest edge in the next row in Fig. 29.4-7, in ft 1.5 for uplift loads on panels that are exposed and within a distance 1.5Lp from the end of a row at an exposed edge of the array;  E =1.0 elsewhere for uplift loads and for all downward loads, as illustrated in Fig. 29.4-7. A panel is defined as exposed if d1 to the roof edge > 0.5h and one of the following applies: 3325 S Baker St 01/12/23