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Explanation of Fire Indicies


Where we have information about a timber's Fire Indicies, we have published it on the information page for that species.
Please note that these indicies have come from a range of sources and should be used as a guide only.



Fire Index Description
Ignitability Index:
(NZ/AS 1530.3)
As per the New Zealand/Australian Joint Standard NZ/AS 1530.3
A scale of 0-20 of how quickly/easily an item will ignite.
Flame Spread Index:
(NZ/AS 1530.3)
As per the New Zealand/Australian Joint Standard NZ/AS 1530.3
A scale of 0-10 of how quickly flame will spread.
Heat Evolved Index:
(NZ/AS 1530.3)
As per the New Zealand/Australian Joint Standard NZ/AS 1530.3
A scale of 0-10 of how much heat is given off.
Smoke Developed Index:  
(NZ/AS 1530.3)
As per the New Zealand/Australian Joint Standard NZ/AS 1530.3
A scale of 0-10 of how much smoke is given off.
Flame Spread Index:
(ASTM E84)
Based on the North American ASTM E84 tunnel test, which is
designed to test the flame spread characteristics of flat surface materials.

The Reference Standard/Mesurement Scale is such that Asbestos
Cemment Board will have a Flame Spread Index of 0, and Red Oak
Flooring will have a Flame Spread Index of 100.
Smoke Developed index:
(ASTM E84)
Based on the North American ASTM E84 tunnel test, which is
designed to test the flame spread characteristics of flat surface materials.

The Reference Standard/Mesurement Scale is such that Asbestos
Cemment Board will have a Smoke Developed Index of 0, and Red Oak
Flooring will have a Smoke Developed Index of 100.
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