Metal fire door – a door that is installed in the openings of medium size and having the fire function. In ordinary times, no fire hazard, metal fire doors must comply with functions of ordinary doors: the protection of buildings from noise, drafts, cold-intrusion. Often, such doors are nominated individual requirements in appearance and packaging. But the main function metal fire doors – to locate the fire source of fire in one room, not letting the fire spread to the neighboring ones. To achieve this, the metal fire door, put forward mandatory requirements. Doors should be made of sheet steel. Filling – fire-resistant material (for example – Basalt Minplita).

All parts of locks and other accessories should be made of metal trudnoplavkih. Castle on fire doors must have a latch ('dog') and a push handle. To ensure the permanent closure of fire doors fitted with closers. Along the perimeter of the door is glued tape Fire and seal from the cold and hot smoke. Construction of metal fire doors designed by the manufacturer, is described in the specification, which subsequently passes the mandatory certification.

Some domestic firms are used to manufacture steel door frames shaped tubes of rectangular or square cross-section, formed when the porch and the casing. However, the traditional conventional metal door way to a constructive solution to the box, as a rule, limits the fire door assemblies of 30 or 45 minutes. The most promising for metal fire doors is the use of steel profiles. In this case, taking into account the technological capabilities of the manufacturer's box is a complex profile, made of sheet steel, bent in a special way. It stands at testing 60 or more minutes. Cloths fire-steel doors are made as a box, which is determined by the thickness of the insulating materials used. Cloth fire door with a box form a double porch on the perimeter which seals affixed smoke suppressant and fire tape. The advantages of metal fire doors Low prices compared to aluminum and wood fire doors. Small production time. Manufacture of any size door (which is permissible on fire regulations). Good heat and sound insulation. Resistance to mechanical damage.