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4TH AVE W DUPLEX 10/10/2022 SDA Job# 9676 <br /> Engineer: CRL <br /> Collar Tie Design <br /> JST#10: Storage Shed Rafters <br /> Rafter spacing= 24 in <br /> Snow load= 25 PSF <br /> Live load= 20 PSF <br /> Dead load=' 15 PSF <br /> Roof slope= 4in/12in <br /> i <br /> 4 32 inches <br /> 911 Ibs <br /> A <br /> 8.0 ft / Rxn= 640 <br /> Tension in collar tie: <br /> RA= 607 lbs <br /> M8= (607x 8.0ft) - (76x 8x 20 ) - (2.7 xT) =0 <br /> T= 911 lbs <br /> Collar tie/rafter grade DF No 2 <br /> Nails: <br /> Use 10d nails Z= 102 lbs CD = 1.15 <br /> Diameter= 0.148" 1.5"/ 1.48"= 1.00 Full nail penetration- No reduction <br /> ► 102 x 1.00 x 1.15= 109 lbs/nail <br /> —► Use(8) 10d nails @ each collar tie/rafter Tension <br /> conn. wl 2x6 collar ties of same grade TTOTAL= 2 x 911 = 1821 lbs <br /> TALLOW= 8 25 x 575 x 1.15 =5455 lbs <br /> Size Rafters: Collar tie tension OK <br /> 288 lbs (Perp. Component of T) <br /> 76 PLF 111 Repetitive member(Cr= 1.15) <br /> 4, 4 4 4. 4 4 4. 4 CF = 1.3 Lu = 1.0ft <br /> Bending: <br /> 0 ft SXx Req'd =6.83 in —�► 2x6 DF No.2 <br /> 8.4 ft / <br /> Shear: <br /> Max moment= 8095 in4 Area Req'd = 3.83 ifl`� 2x4 DF No.2 <br /> Max shear= 608 lbs <br /> Deflection: (L/240) <br /> 2x6 DF No.2 @ 24" o/c lx Req'd = 0.00 in4—i 2x4 DF No.2 <br />