scope:

This standard specifies the functions, requirements and installation of glazing blocks within a frame during its manufacturing, transportation, instalment and operational life. The standard applies to glazing blocks used for all types of flat glass (drawn sheet, float, cast, wired and not-wired, clear and tinted), as well as to derived processed flat types of glass. For certain flat glass products and intended uses, e.g. fire resistant, additional considerations could apply.
This standard applies to all types of vertical, or nearly vertical, glazing (e.g. glazing which is no more than 15o from the vertical), in all types of fixed or opening frames used in buildings.
Structural sealant glazing is excluded from this International Standard.