NOTE:
Refferance Code
FORMULAS
The Governing Lateral Load is Wind Load with WllS.The Diaphragm of The Roof is Considered as Load effect on the Structure.
ASCE
V=Cs·w W=DL+0.25LL+0.2S Tn=Ag•Fy Vn = Tn•Wt(W'+H')½
ASCE 7-16/Section 12.7.2 AISI S400 Section E3 AISI S400 Section E3 Vavailable = 0•vn ,0 = 0.91 AISI S400 Section E4(LRFD)
LEGENDS Total Base Shear Force Seismic Response Coefficient Effective Siesmic Weight Dead Load Live Load Snow Load Strap Yield Strength Gross Area of Seel Strap Strap Tesnsile Strength
V Cs w
DL LL s
Ag Fu Tn Vn Vavailable 0
Nominal Tensile Strength of the Strap Nominal Shear Strength of the Wall Design Strength Resistance Factor
v = cs•w; o.19•31 = 5.89 PSF W=DL+0.25LL+0.2S; 20+0.2s•20+0.2•3Q=31PSF
Diaphragm Analysis Nominal Shear Strength for Diaphragm; Vn=768plf (from Table AISI S400,Table 2.4-1) Vavailable=0*Vn=0.6*768 plf=460.8 plf...(LRFD) Vmax=212 plf Vavalable>Vmax Therefore:Diaphragm is Adequate( 1/2" thickness OSB with #8 self Drill screw edge spacing of the screw 6"and filled spacing is 12")
Chord Analysis Fmax of Chord=Vmax*L/2=212 plf*36ft/2 Fmax of Chord=3816 Ib=3.82 Kips Pn=Ag*Fu=0.255*60Kip=15.345 Kips 0=2 Pavailable= Pn/0= 15.345/2 = 7.67Kip
Pavailable> Fmax on Chord Therefore Chord is Adequate
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