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SolarMount Unirac Code-CompliantInstallationManual El'UNIRAC <br />Step 3: Determine RoofZone (continued) <br />Using RoofZone Dimension Lengt·h, a, determine the roof zone <br />locations according to your roof type, gable, hip or monoslope. <br />Determine in which roof zone your pv system js located, Zone <br />1, 2, or 3 according to Figure 2. <br />h <br />-3-3 <br />ire 2. Enclosed buildings, wall an;d roofs <br />t Roof <br />9443!,_ <br />a'l <br />/9 25/dowi <br />Ga Gable Roof (7°<05 45°) *,4,- _147¥' <br />h <br />4 2 1/ <br />.>243<0 -64/0/.l <br />ble Roof (05 7°) <br />Interior 7onpq '-="'"End Zonde Corner Zones <br />Reofs - Zone 1/Walls - Zone 4 Roofs - Zone 2/Walls - Zone 5 Roofs - Zone 3 <br />Suu,te. ASCE/SE; :7-03,--Mifrimurn Design Loads A,·:Buddi,ig, und Odier Souctuies, Chuple, 6, p. 4.1. <br />Step 4: DetermineNetDesign WindPressure, pnelgo (psO <br />Usjrrg l·Ire ElfectivEF/ird-ATW-(SteF 2), Roc.l,fZo ile Location <br />(Step·39, and Basic Wind-Speed (Step 1), look up the <br />appropriate Net Design lyind Pressure in Table 2, page 6. Use <br />the Ed'ective Wind Area value in the table v.·11ich is smaller than <br />the value calculated in Step 2. tf the installation is located on a <br />roof overhang. use Table 3. page 7. <br />Both down force and uplift pressuresmustbe considered <br />in overall clesign. Refer-to-Section-II,-Stepl forapplying <br />down force and uplift pressures-Pbsitive v.alues_are acting <br />toward the surface. Negative values are actihg away from the <br />surface. <br />15.- <br />t/. <br />Page <br />5