The Jib, Column and Tie Members are made of welded M. S. Angles.The Tie Members and Pulley Blocks for the Jib are connected by a special hinge arrangement made on top of the Column.The Winch unit consists of Electric Motors driving a Variable Speed Gearbox that in turn drives a Helical Gearbox manufactured by a reputed company.Hydraulic Thruster Brakes are provided for both the Hook and the Jib movements.