The contents
- Folding types of grills for Windows
- Hinged design grids
- Collapsible bars on the Windows with internal
Common among ordinary people opinion «against the thief without bars and locks» often based on their own experience of the revaluation of the protective properties of relletov or shutters, interior removable grilles, anti-vandal plastic Windows, widely advertised by the manufacturers of such goods. Practice shows that often the protection from accidental impact or the impact we perceive as the real system that protects against intentional acts of the criminal. And it is two big differences.
Protective grille on the window of the first floor have:
- To prevent and to stop a potential attacker by their presence and appearance before the attempted intrusion;
- To be steel bars on the Windows, made of quality material;
- To have secrets and dirty tricks to which the offender is clearly not ready.
Almost all government offices in their offices on the first floor have window bars, even in the presence of guards or alarms. This requirement for the first floor runs, although most people believes that even the wrought-iron bars on the Windows not able to stop the attacker, equipped with modern tools cutting steel structures.
Bars on the ground floor are designed to hold the offender for a time required for response home security forces. But if, under certain conditions, money, or possibilities for additional measures no steel rods in the Windows of the first floor will be the main protection against hacking.
That can give the use of steel protection on the ground floor ↑
For Windows of the first floor is extremely important to have protective elements. Often use the outer bars on the window opening. This is especially important for ground floor Windows facing back yards, poorly visible from neighboring Windows or from the street. These places are simply perfect for attempts to penetrate into the room. The outer grid structure shall be welded to the steel frame, securely concreted into the window opening. In the simplest case, the frame pin is welded to the rebar, hammered into the stone walls of the first floor.
In their attempts to crack the outer lattice frame, the attackers use two opposite approaches. In the first case, the emphasis is on quick and strong impact on design. For example, by means of a cable and winch car.
In the latter case, the bars on the ground floor can secretly cut with hand tools in a few days, masking the traces of their actions.
Work cracker ↑
The development of technology of metal cutting has led to the emergence of simple and effective mechanical and hydraulic shears and cutters that can easily «to eat» sheet metal up to 5mm, and the round rebar up to 10mm.
These devices weigh up to ten kilograms and are quite quiet and can be easily misused. Very well opposed to the similar technique tempered carbon steel or fittings of manganese steel. In the latter case, cut the rod on the ground floor with a diameter of 8-10mm is possible only through «grinders», spending a lot of time.
Useful to sarasetsout Windows, balconies and loggias not only on the ground floor. According to statistics, the penetration into the room through the window do not only occur on the first and on the second and third floors. Especially if there are new plastic Windows, and there grow tall trees with dense foliage, hiding the window opening from prying eyes.
What needs to be metal window grills ↑
Whatever ways manufacturers of grilles for Windows was not trying to make them less noticeable, decorate or give the valve a nice image protective structure will still be annoying with his presence. It is therefore necessary to choose, bars on the Windows of the first floor will serve a decorative function or protective.
Folding types of grills for Windows ↑
Often resort to the installation of hinged or sliding bars on the Windows. In the normal state they appear or are removed so that no interference was possible to use the window at night, such as the construction are closed on a hinged or built-in lock.
Hinged design grids ↑
For circuits consisting of one or two grates, hinges-hinges and opening like a window sash include a hinged system. The design is a solid weldment of steel rods with the frame, it has no movable joints. In the closed position any load or shock from the grid is transmitted to the outer frame tightly mounted in the window opening of the first floor. Often to increase the resistance of the opposite eaves edge of the grille enhance pins.
Such mobile systems have all the advantages of a stationary lattice structures, if during their production the following conditions are met:
- For the manufacture of gratings are used in steel rods with a diameter not less than 11mm, the ideal material would be forged chetyrehkantnye;
- To connect Cavanaugh has used welded or welded connection;
- Frame to which are welded the bars made of metal or corner profile t-section with flange width of not less than 5mm.
- An outer frame secured in the window opening with three pieces of rebar on each side of the frame. Score cuts into the wall at a depth of 10-12cm.
Adhering to these requirements and following welding procedures can produce the welded bars on the Windows with their hands. For easy folding of the lattice on the window of a standard design measuring 150х80см will need metal corner No. 50, length less than 5m, and steel rods with a diameter of 11mm with a total length of 8.5 m.
The grille on the window is made in the form of vertical steel rods welded with a step of 12-15mm in the box frame area. The frame is welded by electric welding, in the corners and welding seams are frenched power tools.
To install the lattice is needed: the first is to mark the line position of the frame in the window opening of the first floor. Second – uniformly along the line to perform a drill hole to a depth of less than 10cm. Pieces of 12cm rods, hammered into the holes using a sledgehammer. The protruding ends of the segments are aligned in a length sufficient for welding to the frame. The third frame is inserted in the window opening and welded to the mount. All welding performed by welding the electrode is not less than 5mm in diameter.
Unfortunately, with all the positive qualities, the design of the sliding bars on the Windows of the first floor is the weakest link in the system. Not only because of the castle, but mostly because of the fastening system – sheds or rollers. The same vices suffer from roller shutter protection systems. The set of protective lamellas good, bears the load from bumps and bruises, but guides on which slides a flexible band, easier to open than a tin can.
Collapsible bars on the Windows to the internal arrangement ↑
You should pay attention to the widespread folding options of bars on the Windows. The basis of such schemes are lightweight metal rods, connected by hinges. X-shaped pair is the main protective element of the trellis frame. Changing the angle between the bars, the bars can easily be folded into a compact structure or be moved apart on the entire working length. In the window opening of the structure is fixed on two chutes mounted on a ceiling part and the sill portion of the window opening.
The design is very easy to use and very popular as an additional internal protection in the larger Windows – the Windows to the outer shutters. But this resistance to breaking is quite small. Almost to the attacker is not difficult on the first floor to open the lock or cut the hinge fastening the bars.
The demand for the installation of additional protective elements on the Windows of the first floor led to the emergence of various designs of plastic Windows with bars inside. The main emphasis is on the reliability of the metal rod lattices, the presence of a steel frame and a special anti-burglary fittings of the window. Coloring in a pretty white color and the correct selection step of the cells makes their presence completely harmonious and without spoiling the appearance of the Windows of the first floor.
It is possible that the manufacturer rights, claiming high durability of the plastic window mounted lattice system hacking.
But, if you compare the cost of purchasing and installing such a window, it will be much more expensive costs for the installation of separate structures of glass and grid of good quality. In the manufacture of first floor PVC Windows with grille class WK3 will be used quality materials, they no doubt will be in demand, but only for Windows of the first floor luxury apartments and houses.
Beauty or reliability ↑
Most of the tenants of the first floor apartments either have to put up with the presence of steel trellis frame, or to put a very expensive impact resistant glazing. Often by the bars trying to give a more elegant and aesthetically pleasing appearance, the benefit of modern technology can a lot on the first request. But remember: the lattice design on the Windows of the first floor, composed of dissimilar length and form elements, can lose much strength. Cyber criminals will not be difficult at a glance to determine the weakest link.
