This is done by testing the floor s resistance by measuring how much pressure is needed to embed an 11 28 millimetre ballbearing halfway into the boards surface.
Australian hardwood durability ratings.
If you ve already started reviewing your options in the hardwood flooring market then you ll be well aware that engineered hardwood flooring is an increasingly popular product.
Better still it s competitively priced compared to solid hardwood flooring.
Other factors such as blackbutt being weather bushfire and termite resistant also play into it being considered one of the best australian hardwoods for decking.
Class 1 means that timber is projected to last for 50 years in a fully protected area and 50 years outside above the ground.
Class 1 timber lasts for 25 years if it is in the ground such as a deck pole.
As 5604 2005 timber natural durability ratings standards australia 2005 3 https.
Untreated sapwood is generally regarded as class 4 durability irrespective of species.
Durability rating of heartwood above ground 2 class 3 class 3 class 3.
The durability rating is expressed as one of four classes and is based on in ground field trials of heartwood.
The rating system used in as 5604 2005 timber natural durability ratings is based on the average life range in years of test specimens of sound untreated heartwood 35 mm x 35 mm for the above ground tests and 50 mm x 50 mm for the in ground trials.
The durability rating of a species is based on the natural ability of the heartwood of that species to resist decay and insect pests including termites.
The range is from class 1 25 50 years in ground life to class 4 1 8 years in ground life.
Australian hardwood species guide version june 2018 ver2 botanical name eucalyptus obliqua eucalyptus.
As 5604 timber natural durability ratings and as 1604 timber preservative treatment provide guidance on durability requirements for a range of in ground and above ground applications.
Where no data exist to confirm an above ground rating a provisional above ground rating.
Timber species strength durability rating tallowwood f17 f34 class 1 blackbutt f17 f34 class 1 ironbark f22 f42 class 1 spotted gum f17 f34 class 1 blue gum f14 f24 class 2 forest red gum.
The janka hardness scale is a test used to determine the hardness and density of a hardwood timber and bamboo floor.
Class 1 timber durability class 1 is the highest durability rating.
Upwards of 2 20 per square foot for engineered hardwood compared to upwards of 3 40 per square foot for solid.