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e <br /> HORIZONTAL WOOD DIAPHRAGM CHORD DESIGN <br /> Designer Name: CRH <br /> Job Number: 17134 <br /> Job Name: - Level:UPPER FL TYP <br /> Diaph.Label: - <br /> A.Diaphragm Dimensions DESIGN DATA: <br /> IF B Dimensions <br /> 1.Width(ft) A= 13 <br /> 2.Length(ft) B= 34 <br /> 13 ft <br /> Loads; <br /> 1.Wind(lbs) P1= 3323 <br /> P2= 2624 <br /> 2.Seismic(lbs) P1= 2673 <br /> 34 ft N P2= 2356 <br /> 1 t P2 <br /> Chord Properties; <br /> 1.Top plate lumber used TWO 2X4 <br /> C.Moment Diagram 2.Holes in chord area(sq.in) 1 <br /> NDS Table 4A 3.Design tension parallel to grain(psi) Ft 525 <br /> MmAx 4.Design chord tensile area(sq.in) 4.25 <br /> Chord Splice Properties <br /> ••• 1.Nail Size 16d <br /> 14— X -44 <br /> C.Checks/Calcs. <br /> 1.Location of max moment and moment magnitude= <br /> Wind A.Location of Mmaic = Pi X B 3323 X 34 <br /> (From Left or Pi) (P1+P2) (3323+2624) = 19ft =X <br /> Seismic Location of Mm. = Pi X B 2673 X 34 <br /> (From Left or P1) (P1+P2) (2673+2356) = 18.07ft =X <br /> Wind B.Magnitude Mn,.= P1(X) = 3323 X 19 = 31568.5 ft lbs <br /> 2 2 <br /> Seismic Magnitude M,,,.= P1(X) 2673 X 18.07 <br /> 2 = 2 = 24150.6 ft lbs <br /> 2.Chord Tensile Strength Check <br /> Allowable Tension <br /> M Wind= 2428 3570 > 24281 68% <br /> T(lbs)=C= A = Seismic= 1858 1.6 X 525 X 4.25 = 3570 > 1858 52% <br /> 3.Chord(Nailed Splice) <br /> Design Number of Nails <br /> Wind T=2428 lbs Governs 16d Sinker= HF=102 X 1.6 = 163.2 2428/163.2= 15 in HF <br /> Seismic T=1858 lbs DF=122 X 1.6 = 195.2 2428/195.2= 12 in DF <br />