A weld joint assembly is provided. The weld joint assembly includes a first structural member having a first thickness. The weld joint assembly also includes a second structural member having a second thickness. The first thickness is different from the second thickness. The second structural member is connected to the first structural member through a weld joint. A plate is connected to the first and second structural members through the weld joint. The plate has a third thickness. The plate extends and abuts a surface of one of the first and second structural members and is welded thereto at outer edges of the plate leading away from the weld joint. At least a portion of the outer edge of the plate that is opposite to the weld joint is free of attachment to the surface.