2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42
For a long time armored glass has become an integral element of protecting homes, shop windows, cars from intruders or armed attacks. Such a structural element is very often called transparent armor. Armored glasses have found wide application in the life of an ordinary person, and in power and security structures. Their importance in today's world cannot be underestimated.
Design of armored windows
Armored glasses are translucent products that protect people and material property, valuables from theft, damage, damage, and also protect against penetration into the room from the outside through the window opening. The composition of such products includes two elements:
- Armored glass. It consists of several layers of transparent glasses, which are glued together with a polymeric material that hardens under the sun's rays. The thicker the product, the higher the level of protection.
- Rama. Made of aluminum or steel profile, very rarefrom wood. To give the system protective properties, it is reinforced with heat-strengthened steel plates. Such overlays should securely cover the junction of the frame and glass.
The mass of finished armored structures can be more than 350 kg per square meter. This is ten times more than the weight of a conventional double-glazed window. To compensate for the weight, window frames are equipped with electric drives.
Types of armored glass
Armored glass is classified according to its ability to resist a certain type of destructive impact.
According to this criterion, all structures can be divided into several groups:
- Windows with anti-vandal protection.
- Products resistant to breaking.
- Designs that protect against firearms.
Automotive protective structures are placed in a separate group, as they are subject to special requirements. The safety class of armored glass and the requirements for their manufacture are determined by GOST 51136-97 and GOST 51136-2008. Each type of transparent protection is set to protect under specific conditions.
Vandal resistant glass
Anti-vandal windows protect people from splinters when intruders try to break it. They are a multi-layer double-glazed window with an air chamber, where a special armored film is glued onto the glass. The film, in turn, is made of thick plastic. The fragments "stick" to it, so that they do not scatter in different directions.
Such designs are used most often in commercial facilities and in the private sector to protect both windows and doors, as well as exhibition windows. According to GOST, they are divided into three classes - from A1 to A3, each of which is resistant to impact of a certain force.
Burglar resistant glass
Burglary-resistant armored glass differs from the vandal-resistant variety only in resistance to destructive effects. Such a product provides protection against repeated blows with a sledgehammer or hammer, and is able to withstand a ram by a car. Most often, such structures are used to protect banking institutions, shops, establishments with a large turnover of funds, as well as racks for storing drugs.
According to domestic standards, depending on how many blows a burglar-resistant glass can withstand, it is assigned a protection class from B1 to B3. The more blows with a blunt or sharp object the structure withstands, the higher the class.
Bulletproof glass
Bulletproof glass provides protection against through penetration by bullets or their fragments. They are reinforced multilayer structures fastened with a special polymer material. Similar structures are installed at facilities where the risk of an armed attack is high: in the departments of the Ministry of Internal Affairs, at security posts, checkpoints and other similar places.
Bulletproof glasses are divided into protection classes from B1 to B6a. Design tests are carried out with various types of firearms - from the Makarov pistol and Kalashnikov assault rifle to the Dragunov sniper rifle. During the tests, bullets of various weights and with a steel, heat-strengthened or special core are used.
Armored glass for cars
Reinforced side rear and windshields are installed in the car. Their main distinguishing feature is their service life. If a standard armored window can serve for several decades, then products for a car serve no more than 5-6 years. This is due to the nature of the loads that glasses are subjected to daily.
Such translucent armored elements are a multilayer double-glazed window, which is additionally reinforced with a shockproof film. Some of them, in addition to protection from flying fragments, protect against ultraviolet radiation. Often windshields are covered with a thicker film than side and rear ones.
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