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Beam/Top Chord Check Lumber:DF-L No.2 <br /> Moment Demand <br /> Span:Span :j 1 1 2 Orientation j I (ft) p;(Ibs) <br /> Lenght(ft) :1 7.5 1 7.5 1 1 4.6 -493 <br /> Portrait 2 8.5 --493 <br /> 3 10.0 -493 <br /> Linear Dead Load wd= 26 plf Portrait 4 13.9 -493 <br /> Wind Load, Portrait UL= -493 Ibs <br /> Wind Load, Landscape UW= -296 Ibs <br /> #of Attachment per Rafter NA= 4 <br /> x,dx2 <br /> M(x)=Rix—Li)—P/(x—lj)— 2 <br /> 1000 <br /> 500 -- ._ ........ _............. <br /> s <br /> 0CU <br /> � - <br /> 00 5 0 10.0 15•0` 20.0 <br /> -500 _... _.._ — __ __ <br /> (.._...............:............. ....... ...: _.....__._._....._._................. <br /> Length x(ft) <br /> ..................--................................................................._._.........................--._............................................----............. ---.._.. <br /> Ma, Moment <br /> Dead 250 lb-ft <br /> Dead+Wind 844 lb-ft <br /> Dead+Snow 250 lb-ft <br /> Moment Capacity Framing Member Size 2x4 . Lumber Grade: DF-L No.2 <br /> CM= 1 Ct= 1 C,= 1.15 CF= 1.5 fb= 900 psi Ct„and C;are not applicable <br /> Breadth b= 1.50 in <br /> Depth d= 3.50 in <br /> Section Modulus Sx =bd2/6= 3.06 in <br /> Bending Stress Capacity Fb= CM*Ct*Cr*CF*fb= 1553 psi Table 4.3.1 NDS 2015 <br /> Co Fe=CD*Fb Ma*Sx ASD Load Design Bending DCR <br /> Dead 0.9 1397 psi 981 psi D 981 psi 0.70 OKAY <br /> Dead+Wind 1.6 2484 psi 3308 psi .6W+.6D 1985 psi 0.80 OKAY <br /> Dead+Snow 1.15 1785 psi 981 psi D+S 981 psi 0.55 OKAY <br /> Deflection Limit E= 1600 ksi 1 = 5.36 in <br /> Transient Deflection 0.298 in <br /> Transient Deflection Allowed 302 > 180 [OKAY] <br /> Total Deflection 0.642 in <br /> Total Deflection Allowed 140 > 120 [OKAY] <br />