A vibration damper device comprising: a rigid bracket having a substantially flat side shoulder including a substantially rectilinear longitudinal groove or slit thereon, and which is anchorable in a rigid manner on the body of the lintel or of the pillar, next to the covering beam or the plug panel, to arrange said side shoulder facing the lateral side of the covering beam or the surface of the plug panel, with the longitudinal groove or slit locally substantially parallel to the longitudinal axis of the covering beam or to the longitudinal axis of the plug panel; a movable slider slidably engages the longitudinal groove or slit, and is anchorable in a rigid manner to the body of the covering beam or to the body of the plug panel; and a deformable connecting member with elastoplastic behavior, which is connectable to the movable slider in a rigid manner to the bracket.