The DIAGONAL system is a proposal of gates, gates and fence segments with a special design that significantly facilitates installation in places where the terrain is a problem. The design of the segments allows for the rungs to be tilted at an angle of up to 15˚ as standard. This allows for the installation of the fence even in very sloping or undulating terrain. In addition, it is possible to set the height at which the upper and lower crossbars are located.