Product Range > Timber Species > Hardness Rating

Timber Hardness Rating

The hardness rating of a timber species is measured by the Janka Test.

This is a standard test which measures the penetration into the timber of a common load and projectile.

The results relate to a hardness capacity of the material and are expressed in kN. This information is useful where the timber may be subject to potential damage from impacts e.g. a dance floor.

There are 2 sets of published figures; one for 'Green' or freshly felled timber and one for seasoned timber - i.e. timber with a moisture content of 12%.

The ratings given here are:
Soft: less than 5.5
Moderate: 5.5 to 7.0
Hard: 7.1 to 10.0
Very Hard: greater than 10.0

Ref: www.timber.net.au