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• <br /> • Langford Residence 3 <br /> 7507 E Heather Way <br /> Structural Calculations <br /> Lateral Analysis-Wind-ASCE 7-10 Ch 28:Envelope Procedure <br /> Iw:= 1.0 Importance factor <br /> pitch:= 4 Roof rise in 12" <br /> V3s:= 110 3 second gust wind speed(mph) <br /> E •_ "C" Exposure C(Assumed) <br /> xp• <br /> lb=55.5 Building length without roof overhang(ft) <br /> Wb=29 Building width without roof overhang(ft) <br /> OH:= 1.33 Typical roof overhang(ft) <br /> h2:= 8 2nd floor wall height(ft) <br /> hi := 7 Basement wall height(ft) <br /> wb pitch <br /> h:= h1 +h2 + — + 3 =22.833 Total building height to roof peak(ft) <br /> 2 12 <br /> hr h1 +h2+ 2 + —wbpitch =21.833 Mean roof height above grade(ft) <br /> 2 12 <br /> h h—h h 2=5.833 Roof profile height(ft) <br /> roof' 1 — 2— <br /> X:= 1.32 Adjustment for building height-ASCE 7 Figure 28.6-1 <br /> Kl := 0 K2:= 1 K3 := 1 Topographic factors for wind speed-up effect-Figure 26.8-1 <br /> K = (1 +K1•K2•K3)2 Kzt= 1 <br /> Simplified design wind pressure for <br /> structure zonesA thru H-ASCE 7 fig 6-2 <br /> Ps30 (26.6 —7 17.7 —3.9 -23.1 —16 —16 —12.2) (negative implies uplift) <br /> Adjusted design wind pressures for zones <br /> Ps:= "zelw'Ps30 Athru H <br /> A •B C D E F G H <br /> Ps=(35.112 —9.24 23.364 -5.148 —30.492 —21.12 —21.12 —16.104) <br /> By:J. Conner, PE, SE Langford Structural Calcs.xmcd <br /> 2/26/2020 <br /> 51 <br />