The main distinguishing feature of double doors is the design consisting of two wings. For their production, a steel profile with high strength and resistance to cracking is used. Simultaneous operation of the valves is possible, while both they and the box itself can have different dimensions. The two-door door has become most widespread, in which one leaf is large and acts as the main one, the other is fixed with a latch and is used as necessary, for example, for carrying out large furniture.
Fields of application
Such iron doors are most often found in public buildings, in production, as well as in porches and corridors with high traffic. Their use is rational in educational institutions and clinics.
The classic version is available in the form of a design of three elements: sashes and ducts. Refractory and thermal insulation characteristics are achieved using a steel profile and other fireproof materials that provide protection against overheating and deformation.
A two-floor metal door is installed both in multi-apartment buildings and in commercial premises to increase the security of being in them. It allows you to quickly evacuate residents and at the same time reduces the speed of spread of fire.
Finish
Previously, the external design was limited to a metalless faceless cloth, suitable only for industrial premises. Currently, the assortment of stores presents various options coated with powder paint. Nitro enamel not only protects the surface from corrosive phenomena, but also gives an original look. There are also models supplemented with materials such as MDF and laminate. Double fire doors can have forged decorative elements, performed with or without glazing.
The main objective of such structures is to prevent the spread of fire in other rooms, thanks to this, people can easily get out of a burnt building. It is worth noting other features, among which:
- resistance to deformation changes and impact damage;
- in case of fire there is no possibility of a sharp increase in temperature in neighboring rooms;
- a significant reduction in the amount of passing smoke and burning;
- resistance to fire.
Now iron doors, the average cost of which is in the range of 15-20 thousand rubles, have become widespread due to the many advantages and high decorative characteristics. Despite the variety of options, the choice does not cause much difficulty, it should also be noted easy installation, which requires the minimum relevant skills and knowledge of the stages of work. Difficulties can arise with the installation of a mortise lock, as this requires the utmost care.
Advantages and disadvantages
The main advantage is comfortable operation. Bilateral opening, which does not require noticeable efforts, is provided by the pendulum system. External performance will make the room more comfortable and welcoming, while it is presented in an extensive design variety. A two-door door, the price of which depends on the materials used, is optimally suited for non-standard openings, while single-wing ones often have to be made to order.
Such interior doors are not always convenient in small rooms, since in this case their operation is difficult. For small-sized apartments, sliding options are optimally suited, featuring a smooth and silent mechanism.
Varieties
Before purchasing, you need to decide on the desired look. There are two main structural designs - these are sliding and swinging. The canvas can be massive, deaf paneled or glazed. The materials used for the production are MDF, plastic, wood, glass and aluminum.
Double door: installation rules
Preparations for installing the door include dismantling the old structure; in some cases, a change in location for future location is required. The door frame can be purchased with the canvas or made independently. Its dimensions should correspond to the available space, the width should not exceed the thickness of the walls, if the box does not reach the outer surfaces of the wall, the gaps can be closed with the help of extensions. The height of the opening and structure must also be verified in advance. When buying a loop, it is important to determine the appropriate side of the opening, this will prevent difficulties at the final stage of work.
Cost
The two-door door is presented in an extensive price range, the cost of the material is greatly influenced by the material used. Structures made from valuable wood are in the highest segment. Options from MDF and particleboard will be significantly cheaper. Also, the final price depends on the type of lock and the presence of additional elements.
Economy-class options have gained enough popularity, but their affordability is achieved by various manufacturers tricks used to reduce manufacturing costs. A double door of this category has internal voids, so the amount of materials used and, consequently, the cost of the product are reduced.
Also, the surface can be treated with artificial turf. Often, the thin top layer of wood is replaced with artificial veneer, that is, with a laminated coating.