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SYMBOL VALUE UNIT
<br /> BUILDING DESIGN PROPERTIES V 140 ; mph Figure 26.5-SC,page 249a
<br /> BASIC WIND SPEED g >7 to 27 degrees
<br /> ROOF PITCH h 15 4' ft
<br /> MEAN ROOF HEIGHT ft
<br /> a 4
<br /> ROOF SETBACK
<br /> ADJUSTMENT FACTOR FOR BUILDING 1 100 Figure 30.5-1,pg 347
<br /> HEIGHT AND EXPOSURE K -:1 Figure 26.8-1,pg 252
<br /> TOPiGRAPHiCAL FACTOR B y
<br /> EXPOSURE sf
<br /> EFFECTIVE WIND AREA 10
<br /> ZONE ZONE2 ZONE REFERENCE:ASCE 7•10
<br /> VARIABLE DESCRIPTION SYMBOL VALUE VALUE VALUE UNIT
<br /> -32.3 -56.2 _-83.1 psf Figure 30.5-1,pg 346
<br /> NET DESIGN WIND PRESSURE(UPLIFT) PMao -. _
<br /> NET DESIGN WIND PRESSURE(DOWN) Pn,u Calculattion:iom PM!„v=X x Ko ``20.3 20:3 d0:3 psf Figure ,pg 34 „
<br /> •3230 -56.20 -83.10 psf nx Per3a
<br /> NET DESIGN WIND PRESSURE(UP) P„a!ua 20.30 20.30 20.30 psf Calculation:P.,da.n=7 x K,,x P,uoa
<br /> NET DESIGN WIND PRESSURE(DOWN) Pm:down
<br /> SYMBOL VALUE VALUE VALUE UNIT
<br /> DESCRIPTION
<br /> D 3 3.._ 3 psf
<br /> DEAD LOAD B0 30 psf raleuiation:Ptleasn=
<br /> SNOW LOAD S 30
<br /> DESIGN WAND LOAD W -32.30 -56.20 -83.10 psf D+SQRT(0.6)W(asd)
<br /> p •22.?0
<br /> 33 33 33 psf-41.21 -62.05 psf
<br /> ASD DESIGN LOAD(UPLIFr) a,*:a. Calculation:Pa,4sn=1.0D+1.0S
<br /> DOWNFORCE CASE 1 Pd,nan 23.30 23.30 23.30 psf Calculatlon:Pd,ve I.OD+1.OW
<br /> DOWNFORCE CASE 2 Pd,00. 40.73 40.73 40.73 psf Calculation:p.,¢ =S.OD+0.75S+0.75W
<br /> DOWNFORCE CASE Paesisn
<br /> DESIGN(ACTORS&CALCULATIONS FOR THE USE OF L-FOOT TO ROOF TRUSS
<br /> DESCRIPTION SYMBOL VALUE VALUE VALUE UNIT
<br /> CW18
<br /> 42 ft
<br /> MODULE LENGTH B25 ft
<br /> MODULE WIDTH
<br /> DESIGN LOAD PER MODULE T .44 -1092.25 Ibs Caiculation:T=Area a,n,m„znn,v,lmw
<br /> DISTRIBUTED LOAD(UPLIFT) w1.61 -168.04 Of Calculatlon:w=T/Ha2
<br /> DISTRIBUTED LOAD(DOWNFORCE) w7.86 37.86 pif Calculatlon:w=Pe/2
<br /> RAIL SPAN BETWEEN ANCHORS POINTS L
<br /> 2. '`.2 ft assvm,aza3:ve..w•
<br /> POINT LOAD(UPUFr) R 3.21 -336.08 Ibs Calculation:R=PLB/2a�umelzaa+v,!!a.
<br /> POINT LOAD(DOWNFORCE) R5.73 75.73 Ibs Calculation:R=PLB/2
<br /> L-FOOT CONNECTED BY WOOD SCREW 0.5 0.5 Table 11.2A,NDS 2005,page 68(Southern Pine)
<br /> Specific Gravity,Rafter G 5 2.
<br /> Min.Oia.of Lag Screw,1/4 D 2 225 25 in
<br /> 2
<br /> Pullout Value of W 25 25 25 Ibs/in W=1800 G"D3Ja
<br /> 2 2 2
<br /> #of Lag screws T 175 175 1.75 In Table 1-2,2,NDS 2005
<br /> a
<br /> Thread Length W,=W•#of tags a7d
<br /> Design Pullout Value per Mount Wr 787.5 787.5 787.5 Calculation:SF=WvR(Uplift)
<br /> SAFTEY FACTOR SF 2.14 3.53 2.34
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