Fire doors can be installed in communal areas, where the fire department of the city recommends their application. They are categorised in two main categories. 60 minutes of protection (60 REI) and 120 minutes of protection (120 REI). This products is also accompanied by a ‘panic exit device’ and a self-closing hinge. This construction can either be made for a single or a double door, based on the available space of each situation.