Depending on the features of the direction of swinging open the leaves, the entrance doors come with an internal and external form of opening. Moreover, the second option turned out to be more familiar to homeowners, while the front doors that open inside turned out to be no less practical. Moreover, the design of the internal unlocking doors is characterized by an increased property of sound insulation and prevents high heat loss.
Features of the design of doors that open according to the internal type
It is worth noting that special stiffening ribs are an integral element of standard external opening flaps. A distinctive feature of the structures opening inward is the complete set of horizontal and vertical stiffeners.
Although, despite this, the internal unlocking doors are quite popular among residents of high-rise buildings. Firstly, it is convenient, because you do not interfere with your open door to neighbors who at the same time want to leave the apartment. Secondly, do not violate the fire safety rules, which exclude the option of blocking the neighboring apartment.
Door Safety Rules
Experts say that the best option would be to install a door system consisting of two structural parts, one of which is unlocked inward and the other outward. This is the best option if you are worried about security, as it is generally believed that the internal unlocking structures are less secure, which gives attackers a chance to get inside without much difficulty.
Another weak point of the door opening inside the apartment is a narthex. The presence of gaps in it allows attackers to penetrate without special obstacles. Such a defect can be easily corrected by carrying out the procedure for strengthening the site in the castle area, but such a procedure is carried out only in the factory.
Please note that today's design capabilities allow you to upgrade the metal door that opens inward so that its protective properties will increase several times.
Species variety of blocks for internal unlocking doors
Regarding the method of opening, the input structures are divided into the following types:
- Hinged - the most popular and are characterized by opening the sash in one of the sides. It will take a certain area to open the doors.
- Sliding - habitual as an interior option. They are characterized by increased sound and thermal insulation with their relative external fragility. Since the paintings are installed with a shift in the wall, the help of specialists will be required here.
Fire safety features when using an inside-opening design
Regarding the rules of fire safety, it is allowed to use metal doors of internal opening and those that open outwards. Both right and left hinges are allowed.
Before proceeding with the installation of the door structure, it is worth paying attention to some nuances, including:
- the opening angle of the sash, which, according to existing standards, should not be more than 100 cm;
- the space near the entrance block should not be cluttered, which means that in the radius of opening the door and at a certain distance from it, the arrangement of furniture items is prohibited; it should be borne in mind that the paintings of the front door and the kitchen or bathroom located near the structure do not overlap;
- special attention should be paid to the parameters of the external door unit; relative to fire safety standards, the minimum opening width should be at least 0.8 m.
Features of the choice of designs
When buying a metal entrance door with internal door opening, it is worth paying special attention to the strength, reliability and aesthetic appearance of the structure.
Experts recommend, in addition to the above qualities, pay attention to the burglar resistance of the structure. Hacks are divided into two voluminous categories: intellectual and mechanical.
Unfortunately, no matter how reliable the manufacturer assures you, not a single locking device provides one hundred percent guaranteed protection, because any doors have their weak points, regardless of how high-quality and durable their structural elements are: hinges, ducts, casement corners. It is these details when choosing a door of internal opening that should be given special attention.
Having decided on a suitable model, make sure that high-quality material was used as a raw material for the manufacture of the structure.
How to increase door reliability
One way may be to increase the reliability of the frame, reinforcing with the help of special crossbars. Additional protective elements are deepened into the wall by no less than 150-200 mm. The fastening of this design is made using special steel screws. The shutter must be equipped with additional stiffeners, and a sealant is laid around its circumference.
Door mounting rules
Installation of entrance doors of internal opening requires a qualified approach, because, having made even the slightest mistake, you risk not only not having your own doors, but also material values. But at a minimum, such oversights can lead to operational problems.
Among the key recommendations regarding the installation of an internal opening door are the following aspects:
- Installation is best entrusted to specialists in the door construction industry. A professional will do the job sooner and help to avoid possible difficulties.
- In relation to the installation of metal structures, special requirements are put forward related to the direct quality and thickness of the walls.
- In the expansion of the opening, the use of an unstressed technique is assumed.
Please note that it is better to seek help from specialists in the installation of doors who will help solve the issue of the appropriateness of installing this or that design.
When mounting steel doors of internal opening, follow the rules described below:
- first make measurements: from above, from below and in the middle of the canvas;
- after that proceed to the installation of the box by level; this will help to avoid distortions, at this stage it is recommended to position them as close as possible to the corners of the structure;
- make sure that the gaps drilled in the walls strictly correspond to the dimensions of the fasteners;
- bolts (pins) inserted into the gaps must be fixed as securely as possible;
- make sure that the fabric is firmly in contact with the floor;
- at the very last stage of installation, the time for installing and lubricating the loops comes.
With the right method of fastening and a qualified approach to installing a steel door of internal opening, you can be sure that such a design is guaranteed to last a long time and will perfectly function.