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BUILDING DESIGN PROPERTIES SYMBOL VALUE UNIT
<br /> BASIC WIND SPEED V _140 1- mph Figure 26.5-1C,page 249a
<br /> ROOF PITCH B >7 to 27 degrees
<br /> MEAN ROOF HEIGHT h 15 i ft
<br /> ROOF SETBACK a 4 ft
<br /> ADJUSTMENT FACTOR FOR BUILDING
<br /> HEIGHT AND EXPOSURE X 1.00 Figure 30.5-1,pg 347
<br /> TOPIGRAPHICAL FACTOR K 1 Figure 26.8-1,pg 252
<br /> EXPOSURE g
<br /> EFFECTIVE WIND AREA 10 - sf
<br /> ZONE1 ZONE2 ZONE3
<br /> VARIABLE DESCRIPTION SYMBOL VALUE VALUE VALUE UNIT REFERENCE:ASCE 7-10
<br /> NET DESIGN WIND PRESSURE(UPLIFT) Pn.,3oE20.
<br /> -56.2 -83.1 psf Figure 30.5-1,pg 346
<br /> NET DESIGN WIND PRESSURE(DOWN) Pn.,3o 20.3 20.3 psf Figure 30.5-1,pg 346
<br /> NET DESIGN WIND PRESSURE(UP) P„e,vv -56.20 -83.10 psf Calculation:P..,vv=Xx K„x Pn.,ao
<br /> NET DESIGN WIND PRESSURE(DOWN) P..,down 20.301 20.30 psf Calculation:Pn.,mwn=A x K„x P_,
<br /> DESCRIPTION SYMBOL VALUE VALUE VALUE UNIT
<br /> DEAD LOAD D 3 3 3 psf
<br /> SNOW LOAD S 30 30 30 psf
<br /> DESIGN WIND LOAD W -32.30 -56.20 -83.10 psf
<br /> ASD DESIGN LOAD(UPLIFT) Pd.:ign -22.70 -41.21 -62.05 psf Calculation:Pde,;g„=D+SQRT(0.6)W(asd)
<br /> DOWNFORCE CASE 1 Pd.1gn 33 33 33 psf Calculation:Pde,;gn=1.0D+1.OS
<br /> DOWNFORCE CASE 2 Pdmtn 23.30 23.30 23.30 psf Calculation:Pde,fgn=1.0D+1.OW
<br /> DOWNFORCE CASE Pdalgn 1 40.73 40.73 40.73 psf Calculation:Pd.,;g,=1.OD+0.755+0.75W
<br /> DESIGN FACTORS&CALCULATIONS FOR THE USE OF L-FOOT TO ROOF TRUSS
<br /> DESCRIPTION SYMBOL VALUE VALUE VALUE UNIT
<br /> MODULE LENGTH C 5.42 ft
<br /> MODULE WIDTH B 3.25 ft
<br /> DESIGN LOAD PER MODULE T -399.54 -725.44 -1092.25 Its Calculation:T=Area*W
<br /> DISTRIBUTED LOAD(UPLIFT) w -61.47 -111.61 -168.04pif Calculation:w=T/B'2'Assoniszraicp-.
<br /> DISTRIBUTED LOAD[DOWNFORCE) w 37.86 37.86 37.86 pif Calculation:w=PB/2'�SO""szra1�vefON'
<br /> RAIL SPAN BETWEEN ANCHORS POINTS L 6 4 2 ft
<br /> POINT LOAD(UPLIFT) R -368.80 -446.43 -336.08lbs Calculation:R=PLB/2«"'vme:z,.n:cerrvw
<br /> POINT LOAD(DOWNFORCE) R 227.18 251.45 75.73 Ibs Calculation:R=PLB/2«M,-z r:6cerror,
<br /> L-FOOT CONNECTED BY WOOD SCREW
<br /> Specific Gravity,Rafter G 0.5 0.5 0.5 Table 11.2A,NDS 2005,page 68(Southern Pine)
<br /> Min.Dia.of Lag Screw,1/4 D 0.25 0.25 0.25 In
<br /> Pullout Value of W 225 225 225 Ibs/in W=1800 G3/2 D3/4
<br /> #of Lag screws 2 2 2
<br /> Thread Length Td 1.75 1.75 1.75 In Table L2,NDS 2005
<br /> Design Pullout Value per Mount W, 787.5 787.5 787.5 W,=W«If of Lags«Td
<br /> SAFTEY FACTOR SF 2.14 1.76 2.34 Calculation:SF=W,/R(Uplift)
<br /> s.vy a.u.r..o,in..nml�or,.tro�u,.owl ,
<br /> using rtxfma<iDm-L 1r�h,a,a crmnc rtrerwlwx
<br /> o.-nro«.r m rske r.dr<...�aa�s��rn,i.tormea.zone
<br /> r.:,Oro>m„sn■e,nF.v.x
<br /> IlI�2 Fm1�W lndWutt�waL anQrzJa },.�
<br /> FUt Roof j♦�� Hip Row(7'<0577')
<br /> Gable Roof(0 S Try ♦ G.M.R-f Q*<6 sC.
<br /> S •.� i
<br /> 1 F
<br /> iLl
<br /> t F _-
<br /> S F
<br /> t F414
<br /> I,,-zon., ® Ed 7- ;.
<br /> Fod, ��., �® E OF
<br /> l,ey,_7.INh:b.Loral .7o-.]1vah-7ovS Repr,•7ou7
<br /> ZONAL
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