A device including a beam and a flanged threaded nut fixedly attached to the beam at about the first end of the beam. A flange of the flanged threaded nut is sized and dimensioned to cover the first end of the beam. A bolt is connected to the flanged threaded nut via a threaded shank being disposed within the flanged threaded nut. The bolt is slidable along a longitudinal axis of the beam by turning the bolt. The device also includes a threaded nut connected to the threaded shank and disposed between the bolt head and the flanged threaded nut. The threaded nut is slidable along the longitudinal axis by turning the threaded nut. The device also includes a cover, disposed around an outside surface of the beam, sized and dimensioned to slide along the longitudinal axis and to slide over the diameter of the bolt head.