Safety glass is tested and classified in accordance with BS EN 12600: Glass in building — Pendulum test — Impact test method and classification for flat glass. It is based on impact from a 50 kg double tyre impactor dropped from three drop heights, as follows:

• 190 mm for Class 3
• 450 mm for Class 2
• 1200 mm for Class 1

For a pass, the glass should either:

• Not break, or
• Break safely

For more information on safety glass, please click here.