method for producing a fire rated glass unit, independent fire rated glass unit, and method for producing a glass unit

摘要

A fire-rated glass article and method for producing the same preparation by selecting a glass sheet annealed in transparent float of at least 19 millimeters thick and providing the edge of the sheet substantially free from imperfections. The glass plate is then specially tempered to a temperature of at least 575 degrees Celsius for a period of at least 750 seconds, followed by abrupt cooling of fluid.