The composite beam shown is made by welding C200 X 17.1 rolled-steel channels to the flanges of a W250 3 80 wide-flange rolled-steel shape. Knowing that the beam is subjected to a vertical shear of 200 kN, determine
(a) the horizontal shearing force per meter at each weld,
(b) the shearing stress at point a of the flange of the wide-flange shape.
