What is meant by a fire insulation rating and how is it measured? Passive Fire Protection terminology

A fire insulation rating is a measure of time that a specific component or system can withstand the heat generated from a fire and prevent it from breaching the building’s compartmentation.

In a BSEN1366-3 test, there should be no individual hotspots of 180°C, or an average increase of 140°C, on the construction, services, or seal on the non-fire side. For context, it is worth understanding that inside the furnace (fire side) the temperature can exceed 1000°C.

The letter “I” is used to measure a fire insulation rating and the measure is in minutes. For example, EI30 represents 30 minutes/ half hour integrity and insulation and EI240 represents 240 minutes / 4 hours integrity and insulation.

See also: What is meant by fire integrity and how is it measured?

If you have any further questions, please get in touch.

Craig Wells

This question was answered by Craig Wells

Learn More About Craig Wells