What are the different types of fire doors?

Fire Doors are a type of door used for the content of fire in a certain part of the building. They are part of the passive fire protection system. The walls around the fire doors are also often made as fire resistant. Fire doors and walls have an hourly evaluation that expresses the time when they are able to stand in testing conditions.

There are several materials from which these doors can be made. These materials are not all focal points, but rather aim to delay the fire from the spread as long as possible. Some doors are made of wood, others of steel and others are partially composed of natural minerals. The door frame is also most often also resistant to fire and has a strong construction and seal to stop the passage of smoke. Door hardware must also test and find suitable for use on fire doors. The door, frame and hardware together form a "door" that carries the fire ranking.

fire evaluation is assigned based on how long the door or door is able to withstand direct exposure to the fire. HOdin rating includes three hours, 1.5 hours, one hour, 3/4 hours and 1/3 hours. Three -hour fire doors would most often be used in a wall that separates two buildings or two parts of a large building. The wall around the door in this case would be evaluated for an even longer period, for example four hours. 90 minutes or 1.5 hours doors are commonly found in a staircase, such as those in apartment buildings.

Generally, the smaller the areas that are divided by the door, the lower the door of the door. Fire doors with a rating below 1.5 hours are used to divide the occupied areas of the building, while 1/3 hour or 20 -minute doors are mainly used to check smoke in corridors and other internal areas. Many fire doors have internal windows, which are also evaluated. The window is there to allow a person to assess whether the door can be safely handed over in the fire. Glass glass is common for use in these windows and ceramic glass.

Firefighter doors are sometimes unable to feedTito the protection they had most often due to incorrect operation. The door should never be placed so that the fire door is open, because it would cause unnecessary in an emergency. Most of the fire doors should always be closed, but some are open with devices that release them during the fire to close themselves. The door must be certified by the test laboratory and carry the laboratory to be used as a fire door, according to federal regulations.