Depending on the size of the access compartment, different types of Ponzi automatic doors are used for access to the departments and controlled operator filters. PONZI FTA TOS automatic folding doors are of particular interest for smaller spaces without side spaces. Alternatively, Ponzi ALU DFA swing doors have an electromechanical system that moves the paneled or glazed door, which automatically controls its movement, avoiding bumps and slowdowns. PONZI TSA automatic sliding telescopic doors, in the internal partitioning, are the ideal solution for the construction of large passageways. They are particularly indicated in situations such as internal filters and main entrances, where the dimensions of the mechanism do not allow an easy sliding of the doors. They can be made with 2 doors to slide behind the wall or wall, or with three doors, of which the two pieces of furniture collect on the fixed side: in this way the compartment is freed for 2/3 of the total width, creating an easy entrance for the removal of architectural barriers. They can be realized in the Monolateral version with 2 or 3 doors, or Bilateral with 6 doors with the possibility of combining T.O.S.