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Pitzer 8: Associates 07-178 2SL IBC ver6-4.xmcd 4/1312007 <br />3.0 Wind Analysis <br />Basic Wind Speed (Mr H) HWs - 85 <br />Wind Exposure Category (WEC), WEC 1 <br />Wind Exposure, enter. (1)- expcsure "B". i2i- exposure "C", (3)-exposure "D" <br />Mean Roof Height (MRH)MRH:= 21 <br />P., = kl"'Pnet30 Lquannn l <br />Roof Pitch <br />3:12 <br />Simplified Wind Design Pressures (Maim Wind Force Resisting System) 2003 IBC Table 1609.2.1(1)(p• 3321 <br />ps30 (Exposure B at In = 30 feet with Iw=1 O)(p>sf <br />Roof Rise in 12" enter: 111 Flat, 1212, 131 3,1414. 1516. 1617 to 12 m2 5 <br />Ei Simple Wind Pressures <br />ZoneH=14.4 psf ZoneB=2.3psf ZoneC=10.4pst ZoneD=2.4 psf ZoneEOH = 14.4psf <br />ZoneE =-6.4psf ZoneF =-8.7psf ZoneG =-4.6psf ZoneH =-7.Opsf ZoneGOH = 14.4 psf <br />Height 8, Exposure Adjustment Coefficient, it 20031BC Table 1609.6.2.1(1)(p, 29i] <br />F) Adjustment Factor 1 1 <br />Wind Importance Factor 20031BC Table 1604.5 fp.2121 <br />Wind Importance. 1,,:- 1.00 <br />Design Wind Pressures 2003IRC Table 160C3[p.2721 <br />Simplified Wind Design Pressures <br />- combined windward & leeward pressures <br />over projected area: <br />PA:= i. I, ZoneA PE ;= 4 Iw ZoneE <br />Pa =?Aw-ZoneB PF:= \,]w.ZoneF <br />PC:= X-1, ZoneC PG:= 1.Iw.ZoneG <br />PD:=x•Iw ZoneD PH:=1,4wZoneH <br />Least Horizontal Dimension. (LHC) <br />2003MCFigure 1609.6.231p.2921 <br />Feamare 10 <br />LHD:= 14ft h:= 17 it <br />The smaller of: <br />10% of least horizontal dimension <br />al := .1 LHD ai = 1.4 ft Controls <br />0.4h <br />a2:=.4h 82=6.8ft <br />But not less than: <br />4% of least horizontal dimension <br />a3:= .04 LHD a3 = 1 ft <br />3 feet <br />94:= 3 tt <br />&at=3n <br />2SL Version 6.4 <br />Page 3 <br />