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A8 - CIVE207 Fall 2008 Assignment#8(Due Nov II Tuesday 4pm...

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----- CIVE207, Fall 2008, Assignment #8 (Due Nov. II, Tuesday 4pm, Box 2 in Room MD475) . 0.6 inb c a 6.41 An extruded beam has the crosS section shown and a unifonn wall ".!liii!ii~~IiIII" b thickness of 0.20 in. Knowing that a given vertical shear V causes a maximum 0.6 in. d h searing stress 7' = 9 ksi, determine the shearing stress at the four' points 0.6 in. indicated. . 0.6inL I 06inL ~ ~.5 in. 1.5 in. Fig. P6.41 P9.47 A wooden beam is fabricated from three boards, which are fastened together with screws, as shown in Fig. P9.47b. The screws are unifonnly spaced along the span of the beam at inter - vals of 150 rom (see Fig. P9.47a). In service, the beam will be positioned so that bending occurs about the z axis. The maxi - mum bending moment in the beam is M z = -4.50 kN-m, and the maximum shear force in the beam is V y = -2.25 kN. Determine: (a) the magnitude of the maximum horizontal shear stress in the beam. (b) the shear force in each screw. (c) the magnitude of the maximum bending stress in the beam. FIGURE P9.47b x Spacing
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