Question: 3 The built-up beam with centroid C, shown in figure, is made three planks are connected as shown by bolts of 3in diameter spaced every

3 The built-up beam with centroid C, shown in figure, is made three planks are connected as shown by bolts of 3in diameter spaced every 6in along the longitudinal axis of the beam. If the centroidal moment of inertia of the cross-section is /, = 1628.73in*, I, =2673.33 ins, the maximum allowable shear stress in the bolt is Thott = 10ksi all and the maximum allowable shear stress in the wooden plank is plank = 400psi. (a) Determine the allowable vertical shear force V that can be applied on the cross-section. (b) Is the allowable value in (a) a minimum or a maximum? Give a reason

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