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0 <br />:i'UNIRAC Unirac Code-Compliant Installation Manual SolarMount <br />e <br />T 8;mph ' <br />1{38 mis)110(49 <br />64 <br />*r '120< <br />Omp <br />00 mm <br />90 mp <br />(40 mls) <br />'41 <br />30(58) <br />140(63) <br />L <br />Miles per hou <br />(meters per st <br />130{58)re 1. Basic Wind Speeds. Adapted and <br />'irol,le to ASCE 7-05. Values arenominal 140(63)140(63) <br />In 3-second gustwind speeds at 33.teet 063 15067) <br />'e groundfor Exposure Category C 150(67) <br />*122% <br />90(40)min@ Special Wind Region <br />100(45) 130(58} <br />90(401 <br />100{45) <br />110(49) 120(54) <br />Step 3: Determine Roo*Wall Zone <br />The Design Wind Load will vary based on where the <br />installation is located on:a roof. Arrays may be located in more, <br />than one roof zone. <br />Using Table 1, determine the RoofZone Dimension Length, <br />a (fO, according to the width and height of the building on <br />which you are installing the pv system. <br />Table I. Determine Roof/Wall Zone, dimension (a) according to building width and height <br />a = 10 percent of the least horizontal dimension or 0.4h, whichever is smaller, but not less than either 4% of the least horizontal <br />dimension or 3 ft of the building. <br />Roof Least Horizontd Dimension (fi) <br />Height (R) 10 15 20 15 30 40 50 60 70 80 90 100 Ill 1.50 1 /,5 ZOO 300 400 <br />W k „.-1..ft. 9 -:sal.-3 ' 13:.: i? '- 4 .AA. " 4-4 .4 4 4, 5 6 2 7- 87·12 16 <br />15 3133345 6666666 7 8 12 X6 <br />10 -1- .3 3=.¥, 4-5. ·6 ;7 8 081:6 -8---'81'{8 Im,- 12 -ig. <br />25 3 3 333 456 7 8 9 10 10 10 10 10 12 16 <br />30 3 33-3 34, 5 6 789 ro 121 - 12 , +I 2 12 ' 111 il 4 <br />35 3333 345678 9 10 12.5 14 14 14 14 16 <br />40 33 3 3 3 45 6 7 8 9 10 1'2.5 15 16 16 16 16 <br />45 3 3 3334 5 6 7-8 9 10 12.5 15 17.5 18 18 18 <br />50 3333 345 6- 7 8 9 10 12.5 15 17.5 20 20 20 <br />60 3 3 3 3 3 4 5 6 7 8 9 10 12.5 15 17.5 20 24 24 <br />Source: ASCUSED 7-05, Mi'nimum Design Loads for Bu'ddings and Other Structures, Chapter 6, Rgure 6-3, p.41 <br />Nia <br />4 <br />¥