1. Integrity: Under the standard fire resistance test conditions, when one surface of the glass is exposed to fire, the ability of the fireside glass surface to prevent flame and hot air from penetrating or appearing on the unexposed surface for a certain period of time.  

2. Fire insulation: Under the standard fire resistance test conditions, when one surface of the glass is exposed to fire, the ability of the glass component to maintain the unexposed surface below a specified temperature for a certain period of time.  

3. Fire-resistance duration: Under the standard fire resistance test conditions, the duration for which the glass component can withstand a fire from the time it is exposed to fire to the moment it loses the integrity or thermal insulation properties.