The rigid beam BCD is attached by bolts to a control rod at B, to a hydraulic cylinder at C, and to a tixed support at D. The diameters of the bolts used are: dB = dD = in, dC = in. Each bolt acts in double shear and is made from a steel for which the ultimate shearing stress is Tu = 55 Ksi. The control rod AB has a diameter in and is made of a steel for which the ultimate tensile stress is ay = 75 kst. If the minimum factor of safety is to be 3.0 for the entire unit, determine the largest upward force which may be applied by the hydraulic cylinder at C