It typically consists of multiple layers of glass with intumescent interlayers. When exposed to heat, these interlayers expand rapidly, forming an opaque, insulating barrier that prevents fire and heat transfer.
Yes, building codes and regulations often mandate the use of specific fire rated glazing in designated fire compartments, escape routes, and other critical areas to ensure occupant safety.
The numbers (e.g., 60, 120, 180) indicate the duration in minutes for which the glass maintains its integrity and insulation properties under fire conditions, as tested according to relevant standards.