The fire resistance classification is related to the complete glazed assembly. Classes are expressed by the letter(s) representing the considered functional requirement(s), followed by the performance time in minutes. Example: E130 = 30 minutes fire resistance plus 30 minutes insulation.
E = INTEGRITY Provides a physical barrier against flame, hot gases and smoke.
"The ability of the element of construction with a separating function to withstand fire exposure on one side only, without the transmission of fire to the non-fire side as a result of the passage of significant quantities of flames or hot gases from the fire to the non-fire side, thereby causing ignition of the non-fire exposed surface or any materials adjacent to that surface." Reference: EN 1363 / 1364
W = RADIATION Safer escape routes for people and separation distances for combustible materials.
"The ability of the element of construction with a separating function to withstand fire exposure from one side only for a period of time, while the measured radiated heat in font of the glazing is below a specified level.” – Reference: EN 1363 / 1364
I = INSULATION highest performance limitation of surface temperature on the unexposed side.
"The ability of the element of construction with a separating function to withstand fire exposure on one side only, without the transmission of fire exposure on one side only, without the transmission of fire to the non-fire side as a result of significant conduction of heat from the fire side to the non-fire side, thereby causing ignition of the non-fire exposed surface or any material in contact with that surface and the ability to provide a barrier to heat sufficient to protect people near the element of construction for the relevant classification period.” – Reference: EN 1363 / 1364
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