= The cross-section of a wooden, built-up beam is shown below. The dimensions are L w = 20 mm. (Figure 1) Determine the magnitude of the moment M that must be applied to the beam to create a compressive stress of op = 40 MPa at point D. Also calculate the maximum stress developed in the beam. The moment Mis applied in the vertical plane about the geometric center of the beam. Express your answers, separated by a comma, to three significant figures. ►View Available Hint(s) M=, Omax – ΑΣΦΗ|1 vec H 180 mm and ? kN-m, MPa

The cross-sectional dimensions of a beam are shown. Assume b=3 in., tetw=0.4375 in. and d=3.375 in. (a) If the bending stress at point K is 1860 psi (T), determine the internal bending moment M, acting about the z centroidal axis of the beam. (b) Determine the bending stress oH at point H (positive if tension, negative if compression). K d H bf Answers: (a) M2 = i Ib-ft. ( b) σμ i psi. %3D Save for Later Attempts: 0 of 1 used Submit Answer

. A horizontal beam with a rectangular cross section (2 inch x 6 inch) is loaded as shown with P1= 5 kipsand P2 = 10 kips. Determine the maximum normal stress in the beam