Viometaloumin retractable security grille in stairwell upper termination.Installation at a stairwell upper termination of a Viometaloumin retractable security grille, with double solid steel blades, in a residential building in Paleo Faliro, east of Piraeus. The owner wanted to secure the glass skylight, combining Viometaloumin security bars in the fixed glass windows and a type T-90 Viometaloumin retractable security gate protecting the door.