Glass type
Toughened safety glass
Glass heated and cooled quickly so it is about four to five times stronger than ordinary glass. If it breaks it shatters into small blunt pieces, which is why it is a safety glass.
In our catalogue today
Our catalogue list is updating. Call us or send your sizes and we tell you the thicknesses we have.
Where it is used
- Shower screens and doors
- Table tops and shelves
- Balustrades
- Any glass in a critical location
Toughening and processing
- Toughening
- Toughened to BS EN 12150-1; every pane carries the mark.
- Processing
- Toughened glass cannot be cut, drilled, notched or edge-worked after it is toughened. Every size, hole and cut-out is fixed on the drawing before the glass is made.
- Note 1
- Holes follow the BS EN 12150-1 limits for toughened glass: at least as wide as the glass is thick, and clear of edges and corners by a multiple of the thickness. Our drawing checks every position before cutting.
Standards
| Standard | What it covers |
|---|---|
| BS EN 12150-1Glass in building. Thermally toughened soda lime silicate safety glass. Definition and description | What toughened safety glass is, its fragmentation test, flatness and edge work, and the limits for holes and notches. Every toughened pane carries a mark naming the standard. |
| BS EN 12600Glass in building. Pendulum test. Impact test method and classification for flat glass | The impact test that classes safety glass. The class is written X(Y)Z: X and Z run from 3 (lowest drop height) to 1 (highest); Y is how it breaks: A like ordinary glass, B holding together like laminated glass, C in small pieces like toughened glass. |
| BS EN 14179-1Glass in building. Heat soaked thermally toughened soda lime silicate safety glass. Definition and description | Heat soaking: toughened glass held at about 290 °C so that panes with a nickel sulphide inclusion break in the oven rather than in the building. It lowers the risk of spontaneous breakage; it does not remove it. |