Overhead glazing
As overhead glazing glazing are referred to, the opposing sides are mounted on at least two continuous line-shaped and have an angle of inclination from the vertical of more than 10 °.
In Germany, such glazing is regulated more precisely in the technical rules for the use of linearly mounted glazing (TRLV). Roof windows in apartments and rooms of similar use with a light area of up to 1.6 m² and glazing of cultural greenhouses are excluded from this in the MBT. However, glazing with a lower inclination must also be classified as overhead glazing if loads are expected that are not only subject to short-term, variable effects, e.g. B. by snow accumulation on shed roofs.
When insulating glass is the outer pane in overhead glazing either a float glass or a hardened surface layer of toughened safety glass (TSG), the interior of a laminated safety glass (LSG). The inner pane must be able to support the outer one in the event of breakage. If the inner pane also breaks, it must have a residual load-bearing capacity to ensure sufficient time for noticing the damage and for replacing the pane.
The laminated safety glass for overhead glazing is often made of partially toughened glass , as this also offers a greater residual load-bearing capacity in the event of breakage due to the larger pieces of glass.
If there are no requirements for thermal insulation and visibility, overhead glazing can also be made from concrete glass .