A wooden beam is fabricated by gluing four dimension lumber boards, each a= 35 mm wide and b= 90 mm deep, to a 32 * 400 plywood web, as shown. Determine the maximum allowable shear force that this section can carry if the allowable shear stress in the glued joints is 0.26 MPa. Moment of inertia: 1 = 481.9 x10 mm [h=400 mm, t = 32 mm, a= 35 mm, b = 90 mm, w = 102 mm) 20.49 KN 15.98 KN 23.1 KN 28.52 KN 00 7.75 KN