UB hanging plate is the most widely used joint tower fittings in the world, and some products with improved structure have new names, such as trunnion hanging plate and so on. Their common features are: the upper end of the hanging plate (side of the cross arm) is connected with the cross arm by a long rod bolt, and the bolt bears the force state of the double shear plane, and the lower end of the hanging plate (side of the insulator string) is usually connected in a groove shape.