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Una puerta elevadora caracterizada por haberse previsto su superficie dividida en dos por una charnela en sentido horizontal a fin de que al elevarse se doble sobre sí misma quedando plegada contra el umbral de la puerta existiendo en puntos medios del bastidor de la mitad inferior unos rodillos que se deslizan por unos carriles previstos en el marco de la puerta para guiar el ascenso del conjunto.