Arm, of those comprised by a horizontal straight section (2), of rectangular section, extended at one end by a radial section (3) in descending direction until finishing at a lower end (4) with at least one through hole (5), characterized in that the arm (1 - 1.1 - 1.2 - 1.3 and 1.4) comprises at the free end of the horizontal straight section (2) coupling means, in its middle zone, anchoring means and at the lower end (4 and 4.1) two through perforations (5), the radial section (3) being configured by two consecutive radii. (Machine-translation by Google Translate, not legally binding)1. Brazo, de los comprendidos por un tramo recto horizontal (2), de sección rectangular, prolongado por un extremo por un tramo radial (3) en dirección descendente hasta rematar en un extremo inferior (4) con al menos una perforación pasante (5), caracterizado porque el brazo (1 - 1.1 - 1.2 - 1.3 y 1.4) comprende en el extremo libre del tramo recto horizontal (2) medios de acoplamiento, en su zona media, medios de anclaje y en el extremo inferior (4 y 4.1) dos perforaciones pasantes (5), configurándose el tramo radial (3) por dos radios consecutivos.
