Question
wooden beam is made up of three full-size planks that are joined together by screws to
form a cross section as shown. Each screw can resist a force of 120lb. What should be the
maximum spacing of the screws to resist a shear force of 1200lb? The moment of inertia of
the cross section INA= 776 in

2 in, x4 in. NA 开机 -2 in.x 10 in. 5.67 in.
0 0
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Answer #1

27nx 4in 1 zinx loin 5.67in We know that, sh point fra Shear stress at any neutru axis - from T - FA I. B В. Fshear force A APage Ffi Date 25-VFALTANATHA From thir T = FAY I AB F=240 A= 6x2 12 182 considering stw to screw to be at op Cross-section miPage Ffi Date We have to find E- 24odth 12001 COST section stress COD bear shear 1-4ut Heinz 2.059 blin てこ FA IB 24607 2.059.

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