The issue of window strength is very rarely posed to developers or residents, since in the house such structures are very rarely subjected to additional load. But still, there are times when the child really loves to look out the window, relying on the double-glazed window with the whole body or in the house, except for the main household chores, some kind of artisanal production occurs. Most of all, public institutions or industrial organizations need shock -resistant windows, in which gaps in the window openings arise through a number of reasons in the form of the missing double -glazed window in the window frame. Therefore, it is necessary to choose windows regarding their needs, since more durable windows are not cheap, and if there is no need for installation of such products, then there is no need to pay exorre.
Manufacturers make windows with three types of strength, which differ in different degrees of the strength of the glass. The line of such products is distributed from 1 to shockproof windows with the Su-2 designation is very difficult to break or damage, in the windows with the Su-4 class it is impossible to break the glass without using a special tool. Su-1 class windows are often installed in residential buildings, since there is often no need to install more durable.
