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:FUNIRAC Unirac Code-CompliantInstallationManual SolarMount 1 <br />Step 7: Determine adjustmentfactorfor height and exposure <br />category, A <br />Using the Exposure Category (Step 6) and the roofheight, <br />h GO, look up the adjustment·factor jor height and exposure in <br />Table 4. <br />Table 4. Adjustment Factor (A) for Roof Height & <br />Exposure, Category <br />Exposure <br />72%8CD <br />Step 8: Determine the Importanee Factor, I <br />Determine if the installation is in a hurricane prone region, <br />Look up the :Importance Factor, 1, Table 6, page 9, using the <br />occupancy category description and the hurricane prone <br />region status. <br />Step' 9: Calculate the Design Wind Load, pnet i(psf) <br />Multiply the Net Design Wind Pressure, p n:t.yo (ps 0 (Step 4) by <br />the adjusrmentfactorfor height and exposure, A (Step 7),the <br />Topographic Factor, K. (Step 5), a nd the importance Factor, I <br />(Step 8) using the following equation, or Table 5 Worksheet. <br />15 1.00 1.21 1.47 <br />20 1.00 1.29 1.55 <br />25 1.00 1.35 1.61 <br />30 1.00 1.40 1.66 <br />35 1.05 1.45 1.70 <br />40 1.09 1.49 1.74 <br />45 1.12 1.53 1.78 <br />50 1.16 1.56 1.81 <br />55 1.19 1.59 1.84 <br />60 1.22 1.62 1.87 <br />Source: ASCBSE} 7-05, Minimum Design Loads for Buidings and Other <br />Structures, Chapter 6.iFigure 6-3, p. 44. <br />pnet (psD = AKzd prut3O <br />Pner (pSD = Design WindLead Clepsfminimum) <br />A = adjustment.factorfor height and exposure category (Step 7) <br />Kzt = 7bpographic Factor at m'ean roofheight, h (fo (Step 5) <br />1 - importance Factor (Step 8) <br />pneso (psD = net design wind pressure.for Exposure B, at height <br />= 30,1=1 (Step 4) <br />Use Table 5 below: to caltulate Design Wind Load. <br />The Design Wind Load will be used in Part II to select the <br />appropriate SolarMount Series rail, rail span and foot spacing. <br />In Part II, use both the positive (dow-nforce) and the negative <br />(uplift) results from this calculation. <br />Table 5.Worksheet for Components and CladdingWind Load Calculation: IBC 2009,ASCE 7-05 <br />MT#ble Desuiption Simbot Value Unit Step P.·prenee <br />§1!i!8-ia.81*ht.1-.'·' ··'-c·. :.· 5 -',-'·-·.zj-2.--I_,-fil-2-..· 4 1, 4,4 2 1 ·· ..3 - --k i <br />Building, Least Horizorital Dimension ft <br />Roo'fli€ch · ······ ·.·5 .[,1/ .£/2 41'.fi h-* 13%r , ' ¢ L ,:heprea . _*- -_ -4 <br />Exposure Category -6 <br />4 - ./0 T,Badic,WindSEe#* . ':-· ki .· : -: -2-' au v. DI r":1 1 -ell 1£ 1% 211; f-Amph-' rt' 0 .311...1.- 1.'=Figure'61*9- <br />Effective*/ind Area cf <br />2 <br />Radf ZB/6 -SKIE;&214 Lgr@th ·1 = + y. 1 11 · 1 · a - . 1 ¢ft < P '. 11 '3-.1 1 +lawd .1 - <br />Roof Zone Location j Figure 2 <br />Net Design Wiriti Presture, . - -Pn*0 psf 4 ' ' : Table 2,'3 <br />Topographic Factor Kzt x 5 <br />Adjustment factor for height and exposure-category--A '1*46.44 <br />Importance Factor I x -- 8 Table 5 <br />1btal DesignWind Load F net p 9 <br />O <br />P.6. <br />8