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WIND LOAD VARIABLES <br />MODULE LG370Q 1 C-A5 <br />WIDTH 40.00 in <br />LENGTH 66.93 in <br />AREA = L (in) * W (in) * (ft2/in') <br />VELOCITY PRESSURE <br />Kz = (HEIGHT AND EXPOSURE) 0.7 <br />Kzt = (SPEED UP FACTOR) 1.38 <br />Kd = (WIND DIRECTIONALITY) 0.85 MPH <br />V = (BASIC WIND SPEED) 110 MPH <br />I = (IMPORTANCE CATEGORY) 11:1.00 <br />qh = 0.00256 * Kz * Kt *Kd* V * I <br />DESIGN UPLIFT <br />ATTACHMENT TYPE Lag Bolt <br />F = (DESIGN UPLIFT LOAD) <br />FORCE PER ATTACHMENT <br />MTOTAL = M1 + M2 + M3 <br />FTOTAL _ (Fl + F2 + F3) / MTOTAL <br />SAFETY FACTOR <br />SAFETY FACTOR, F/FTOTAL > 1.0 1 1.10 > 1.0 <br />WIND LOAD <br />MINIMUM ATTACHMENTS <br />= (EXTERNAL PRESSURE COEFFICIENT) <br />= 0 (ARRAY IS AN OPEN STRUCTURE)ET+o*�++ <br />GC = (EXTERNAL PRESSURE <br />COEFFICIENT) ASMT-+UFlG"RE590-M" <br />-0.8 <br />o <br />0 <br />18.59 ft2 <br />P = qh * (GCP - (GCpi = 0)) <br />20.35 psf <br />N = (NUMBER OF MODULES) <br />9 <br />F, = P * A * N 3405 psf <br />M1 = (NUMBER OF FLASHINGSS) 1 5 <br />GC = <br />-1.2 <br />N <br />z <br />0 <br />o <br />of <br />25.43 psf <br />P = qh * (GCP - 0) <br />30.52 psf <br />N = (NUMBER OF MODULES) <br />4 <br />5/16" LAG BOLT <br />F2 = P * A * N 2270 psf <br />761 Ibs/attachment <br />M2 = (NUMBER OF FLASHINGSS) 3 <br />15 <br />GC = <br />-2.0 <br />M <br />ui <br />z <br />0 <br />LL <br />p <br />� <br />694 Ibs/attachment <br />P = qh * (GCP - 0) <br />50.87 psf <br />N = (NUMBER OF MODULES) <br />5 <br />F3 = P * A * N 4729 psf <br />OK <br />M3 = (NUMBER OF FLASHINGSS) T 7 <br />A MINIMUM OF 15 FLASHINGSS REQUIRED <br />WITH 1 ATTACHMENT(S) PER FLASHINGS(S) WITH 2.0" DEPTH OF LAG IN DOUGLAS FIR <br />WEIGHT LOAD <br />QUANTITY <br />WEIGHT (Ibs) <br />TOTAL (Ibs) <br />MODULES <br />18 <br />38.58 <br />694.46 <br />FLASHINGSS <br />30 <br />1.72 <br />51.72 <br />RAIL LINEAR FT <br />140 <br />0.72 <br />100.86 <br />END CLAMP <br />12 <br />0.05 <br />0.60 <br />MID CLAMP <br />30 <br />0.08 <br />2.40 <br />DC OPTIMIZERS <br />18 <br />1.4 <br />25.20 <br />TOTAL <br />875.23 <br />WEIGHT LOAD = Ibs / = TOTAL Ibs / (AREA * N) I2.62 <br />TOTAL WEIGHT LOAD OF SOLAR EQUIPMENT IS 2.62 Ibs / ft2 <br />WEIGHT LOAD NOTES: <br />TOTAL NUMBER OF ATTACHMENTS IN SYSTEM IS DICTATED <br />BY WIND LOAD REQUIREMENTS OR BY MAXIMUM SPAN <br />REQUIREMENTS OF RAIL MANUFACTURER, WHICHEVER IS <br />GREATER. <br />- MINIMUM ATTACHMENTS PER WIND LOAD: 15 <br />- MINIMUM ATTACHMENTS PER SPAN OF 6.000000ft: 30 <br />- NUMBER OF ATTACHMENTS REQUIRED: 30 <br />PU13ET SOUND SOLD <br />805 Rainier Ave S <br />Seattle, WA 98144 <br />Tel: 206-706-1931 <br />W <br />Q CD <br />N <br />Q m <br />W 0� <br />= 2 <br />J uj Lo W <br />m <br />0 PRELIMINARY DESIGN 8/27/20 <br />REV DESCRIPTION DATE <br />DRAWN BY LA <br />CHECKED BY AL <br />SOLAR NEXUS #: 9155 <br />SALES: JULIE WILCOX <br />PM: BILL ULSUND <br />WIND AND WEIGHT <br />LOAD CALCULATIONS <br />PV-103 <br />31a <br />