EI180 glass is used in the most critical applications, such as nuclear facilities, major transportation hubs, high-security government buildings, and large industrial complexes requiring three hours of ultimate fire protection.
These are European classifications: E (Integrity) means the glass prevents the passage of flames and hot gases. EW (Integrity & Radiation) means it prevents flames/hot gases and significantly reduces radiant heat. EI (Integrity & Insulation) means it prevents flames/hot gases and limits temperature rise on the unexposed side.
Yes, fire rated glass can be incorporated into double or even triple glazed units to provide additional thermal insulation, acoustic performance, or security, while maintaining its fire rating.