Mr. Eoin O'Dowd:

There is a table of classification of reaction to fire of construction products for the key thresholds below the 15 m mark and above the 15 m mark. However, other characteristics come into play, including the distance of the building to a boundary to another site, where additional characteristics, such as fire resistance, also come into effect for the given buildings. It is a complex system of characteristics that come into effect, but those would be the key thresholds.