This European standard specifies and classifies basic alkaline earth silicate glass products for use in building. It indicates their chemical composition@ main physical and mechanical properties@ dimensional and minimum quality requirements (in respect of optical and visual faults). This European standard applies to basic alkaline earth silicate glass supplied in jumbo sizes@ split sizes@ supplied sizes or in cut sizes for final end use. This European standard does not apply to final cut sizes having a dimension less than 100 mm or a surface area less than 0@05 m2.