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474_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

# 474_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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468 CHAPTER 5 Stresses in Beams (Basic Topics) Solution 5.11-4 Wood box beam All dimensions in millimeters. nail spacing allowable shear force for one nail shear flow between one flange and both webs f allow 2 F s 2(1200 N) 100 mm 24 kN/ m f 1200 N F 100 mm s h 310 h 1 260 b 260 b 1 260 2(50) 160 . 10.7 kN ; V max f allow I Q (24 kN/ m)(411.25 * 10 6 mm 4 ) 926.25 * 10 3 mm 3 926.25 * 10 3 mm 4 Q Q flange A f d f (260)(25)(142.5) I 1 12 ( bh 3 b 1 h 1 3 ) 411.125 * 10 6 mm 4 f VQ I V max f allow I Q Solution 5.11-3 Q flange A f d f I 4.284 * 10 4 in. 4 I bh 3 12 ( b t ) h 1 3 12 t f 1 in. b 20 in. t 5 16 in. h 62 in. h 1 60 in. ; F 1994 lb/in. F VQ flange 21 F 1994 * 10 3 lb.in. V 280 k f 2 F VQ I Q flange
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