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t SolarM@unt Unirac Code-Compliantbistallation Manual; :!:UNIRAC_
<br />Table 3. pne,30 (psf) Roof Overhang
<br />WA+e |805fc;Wind Speec, V (mph)
<br />Wh,dArea .* ·- .
<br />Zone (50 -'90 100 /20 140 ' - ·2.:!50-,170
<br />2 10
<br />2 20
<br />2 50
<br />2 100
<br />3 10
<br />3 20
<br />3 50
<br />3 100
<br />2 10
<br />2 20
<br />2 50
<br />2 100
<br />3 1,0
<br />3 20
<br />3 50
<br />3 100
<br />2 10
<br />2 20
<br />2 50
<br />2 100
<br />3 10
<br />3 20
<br />3 50
<br />3 100
<br />I .-21.*.1/,
<br />120.6
<br />, ribff. .,
<br />3 '7234.6..2 :t
<br />----,·47.31.·' 1
<br />I ./1.1- l.ob 1 2 -2
<br />fi, : .<
<br />-27,:2'-3 -':
<br />;,4471·=·- ;
<br />45:-7 .
<br />0--35-3
<br />-30.9.E.
<br />;-'24.7 ?·-.
<br />'-·234:d·'W',2
<br />'-P·AiM·' ·19>'4
<br />'-3 622.2.-1 -
<br />- r·:6*7 D ). 25
<br />VER)-·.6 = f·?? '
<br />4?41'2-'2
<br />-25.9
<br />-25.5
<br />-24.9
<br />-24.4
<br />-42.7
<br />-33.5
<br />-2'1.4
<br />- 12.2
<br />-33.5
<br />-33.5
<br />-333
<br />-33.5
<br />-56.4
<br />-50.9
<br />-43.6
<br />-38.1
<br />-30.5
<br />-29.6
<br />-28.4
<br />-27.4
<br />-30.5
<br />-29.6
<br />-28.4
<br />-27.4
<br />:. /31 A
<br />D-·-29.5.It?. i
<br />t" 2.p5]:'6':91
<br />125.9
<br />i.040:'6
<br />.' 2426-if:'6.i, $'·ri
<br />3. .:-fi# 2: -D
<br />; t:&35:8..2'1 i
<br />«'434.3 2 · 9 !
<br />4.-4-33.-t .2.-.·
<br />l-.3316:4 j·.-r.-1
<br />2:4·':063·4.34-: .'i
<br />i.:4633-1.:FIG
<br />-37.3
<br />-36.7
<br />-35.8
<br />-35.1
<br />-61.5
<br />-48.3
<br />-30.8
<br />-17.6
<br />-48.3
<br />-48.3
<br />-48.3
<br />-48.3
<br />-81.2
<br />-73.3
<br />-62.8
<br />-54.9
<br />-42.6
<br />-40.8
<br />-39.5
<br />-43.9
<br />-42.6
<br />-40.8
<br />-39.5
<br />,: 456.6 -: .7 1
<br />63;420..6 21,14
<br />C·.'1456,74-4t 2 5//.7. r·2·k
<br />1 '·'34-·1 7- 2
<br />24*fl]
<br />4.-.·- .f.64.4...
<br />3...=-33.j,?5.... ':-4 11
<br />y.40%5.9.t A,)' &
<br />kn*.11'* 1
<br />H:@¥i?kij.·33
<br />79-1-BODW..>321
<br />:- · ···06.4.4 .15,·-AbI·I·-1
<br />-50.8 - ?,58.3 ' ··3 -74.9
<br />-49.9 f ;·:3'51-jf.,....' -73.6
<br />-48.7 ; ;,23,19( 4fi -71.8
<br />-47.8 ,a···-.3-.5.4:9. -bl -70,5
<br />-83.7 r' >96.Dy, 2-9 -123.4
<br />-65.7 F. ..'·3*,41241 -96.8
<br />-41.9 2 48. I 1,31 -6I.8
<br />-23.9 l ..017.40:.:-6 -35.2
<br />65.7 6-,·.- -275.5 - i ':,j -96.9
<br />-65.7 '-'=-'; J N#:59-01 -96.9
<br />-65.7 44=9§.fb<'b -96.9
<br />-65.7 '.i. -45,33·.:j -96.9
<br />-110.6 ;1126:9.-163.0
<br />-9,58 i':· :'4 iU-N'·.j -147.1
<br />-85.5 .998...1. c ..i -126.1
<br />-74.7 ..) f..1285.8 --2. i -110.1
<br />-59.8 3 5 1*£34 -88. I
<br />-58.0 Ou*5':·2·'- 3 -85.5
<br />-55.6 ./?Ki,-Ai,J-'3>. -82.0
<br />-53.8 r,378'619'-'7 -79.3Lir "·.
<br />-59.8 ?- Ct=18.66.·fa -88.1
<br />-58.0 12.-24634'4 -85.5
<br />-55.6 U.--36318-'24 -82.0
<br />-53.8 §: i'£267'.7,·21 -79.3
<br />Source: ASCE/SEI 7-05, Minimum Design loads for Buildings and Other Sbuctums, Chapter 6, p, 44.
<br />Step 5: Determine the Topographic Factor, Kst
<br />For the-pappeses-e#*his-eedeeempliance·doetimentrthe -
<br />7bpogi·aphic Factor, Kzt, is taken as equal to one (1), meaning,
<br />the installation is surrounded by level ground (less than 10%
<br />slope). If the installation is not surrounded by level ground,
<br />please consult ASCE 7-05, Section 6.5.7 and the local building
<br />authority to determine the 1bpographic Factor.
<br />SL=p 6, Deternlie Equjure Cuiesury (B, C D)
<br />Determine the Exposure Category by-using the·following
<br />definitions fbi Surface Bri.lighness Catpgaripq
<br />-S'WRFACE-ROWOHNESS-L. lias upeli Le=li,iin vvilli actil-
<br />tered obstructions having heights generally less than
<br />30 feet. This category includes flat open couittly,
<br />grasslands, and all water surfaces iii hurricane prone
<br />regions.
<br />SURFACE RouGHNESS,D: has flat, unobstructed areas
<br />and water surfaces outside hurricane prone iregions.
<br />This rafpgrlry inellirlpq qmnnrh mil,1 fl:atc, fmlt flprq, 11·trl
<br />unbroken ice.
<br />The ASCE/SEI 7-05 defines wind surface roughness
<br />categories as follows:
<br />SURFACE RouGHNESS B: is urban and suburban areas,
<br />wooded ai·eas, or other-trerrain with· numerou.5 closely-
<br />spaced obstructions-having-the size of-single-fainily -
<br />dwellings.
<br />Also see ASCE 7-05 pages 287-291:for further explanation alid
<br />explanatory photographs, and confirm your selection with the
<br />local building authority.
<br />4
<br />F.4
<br />1
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