The two layers of safety glass in high-rise buildings must be tempered. A single piece of glass over 1.5 square meters must also be toughened, and windows above seven floors must also be toughened, and floor-to-ceiling windows below 50cm must also be toughened. There are also linkong railings, which need to be toughened if there are no windows outside.
Tempered glass is a type of safety glass, but it cannot be used as a railing on floor-to-ceiling windows, unless it has two layers (the reason is that the glass used for railings must be caught by one layer of glass after it is broken, so as not to fall and hurt people. ), glued glass can be used as a railing. High Safe Building Glass.