About E Rating
Class E (Integrity) rating describes the level of fire integrity provided by a building element with a separating function. It measures how well e glass can withstand fire exposure on one side without allowing flames, smoke, or hot gases to pass through to the non-exposed side. By maintaining compartmentation, integrity glass solutions help slow the spread of fire and reduce the risk of ignition on adjacent surfaces. However, Class E e fire safety glass does not prevent the transfer of heat.
Class E (Integrity) rated glass is classified in accordance with European standard EN 13501-2. This e glass classification defines how long integrity glazing systems can maintain their performance during a fire, with time periods expressed in minutes such as 30, 60, or 90. For example, e glass rated for 30 minutes is classified as E30.
Performance criteria for the E (Integrity) rating include:
- No sustained flames on the side of the glass not exposed to fire
- No openings larger than Ø 25 mm or 6 × 150 mm
Related Classification
Class EI
Blocks the transfer of heat while stopping flames, smoke, hot and toxic gases.
Class EW
Minimizes the transmission of radiant heat while stopping flames, smoke, hot and toxic gases.
