About E Rating
Class E (Integrity) rating is a measure of the ability of a construction element that has a separating function to withstand fire exposure on one side without allowing flames, smoke, and hot gases to pass through to the unexposed side resulting in the transmission of fire. Thereby, maintaining building compartmentation, Class E glass impedes the ignition either of the unexposed surface or of any material adjacent. Class E rating does not however prevent the transfer of heat.
Class E (Integrity) rated glass is classified in accordance with European standard EN 13501-2, Fire classification of construction products and building elements to maintain integrity in the event of a fire for a certain period of time. This time (the classification period) is declared in minutes using specific periods (30, 60, 90, etc…). A Class E fire-rated glass with a 30 min classification period will be declared as E30.
Performance criteria for E = Integrity rating:
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No sustained flames on side of glass not exposed to fire
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No openings larger than Ø 25 mm or 6 x 150 mm
Related Classification
EI classification
Class EI (Insulation) fire-rated glass is the highest performance classification and blocks the transfer of heat while stopping flames, smoke, hot and toxic gases.
EW classification
Class EW (Integrity & Radiation) fire-rated glass limits the transmission of radiant heat, reduces the risk of fire spread, and creates safer separation distances
