he overhead electric hoist C rides along a track on the horizontal beam AB (Assume the beam is simply supported, meaning the force of the joining bolts at A and B are negligible). The hoist is used to lift a mass of 50 Mg. In addition to the vertical force carried by the hoist, the beam also supports the three vertical forces of magnitudes F1= 220 kN, F2= 125 kN and F3= 100 kN. Consider: x1= 1.6 m, x2= 7.4 m, x3= 3.6 m and x4= 2.4 m.