For these reasons fire rated glass is mainly installed in larger premises where many people are present. Examples here are such buildings as schools, public offices, hospitals or manufacturing plants.
However, in private households too, fire rated windows are more and more in evidence due to their contribution in saving people’s lives and preventing damage.
Fire rated glass can be classified according to its particular properties and abilities as follows. Fire resistance class G offers protection from fire and from smoke, but not from heat itself.
This type of glass, after checking by the planning permission authorities, is only approved for interior use and only in those locations where there are no fears of a build-up of heat.
G-Glass consists mostly of a single sheet of glass with reinforced wire mesh. On the other hand, fire rated glass of class F is not only resistant to both fire and smoke but is also heat resistant and thereby blocks the spread of both fire and heat.
F-Glass consists of two or three sheets of glass which have been covered by a fire-proof foil material. In the spaces between the panes there is a so-called water glass, or aqueous gel fluid, which helps to cool the glass.
Where a fire exceeds a certain temperature or the fire rated window gets too hot, the pane nearest to the fire will break releasing the gel. This now foams building a heat-resistant layer for the pane behind it. This production of foam hinders the spreading of flames and heat. Fire rated windows of class F are frequently used in exterior bearing walls.
How long a fire rated window must be able to withstand flames and heat is given by the numerical value after the resistance class letter. A window given as F90 can resist fire and smoke for 90 minutes. Fire rated glass thus not only can resist direct flames and heat for a given period, but can be enhanced to take advantage of other types of window.
By applying a particular foil fire rated windows can also be used to reduce noise levels, as thermal insulation, as security against burglary, to provide sun shade and take on other important functions.
|G-Glass||F-Glass||Resistance in minute||Properties|
Maximum fire protection can be effected, besides choosing the right fire rated glazing, by using suitable fire protection sealing, mounting material and frame.
Without these supplementary components it is not possible to install complete fire barriers; certified fire protection systems of any quality are therefore only offered as complete solutions.
Frame materials are aluminium and timber. UPVC is not offered due to the fact that toxic gases are released when it melts making it unusable for fire protective windows.
Although timber burns well, it is suitable for fire protection as the frame first chars which actually provides extra resistance thus slowing down the advance of any fire. Ferner bietet Holz die ideale Fläche zum Auftragen von feuerresistenten Schutzanstrichen.
Because timber has been a major house construction material over the last centuries, fire rated windows with timber-finish appearance are particularly well suited for buildings with protected status; the frame of timber has the modern attributes of a fire rated window and retains its original appearance.