Janka Rating Australian Hardwood

It is one of the best measures of the ability of a wood species to withstand denting and wear.

Janka rating australian hardwood.

Australian hardwood timbers are among some of the world s hardest by the internationally recognised and uiversally adopted janka hardness ratings. Just as some people have the genetics that allow them to run fast jump high run long distances or bench press heavy weights species of timber also have genetic dispositions that allow them to withstand intense heat humidity high traffic high. Technically the test involves pushing an 11 18mm diameter steel ball into wood fibre until it reaches half of the diameter of the ball. A common use of janka hardness ratings is to determine whether a species is suitable for use as flooring.

28 stunning high janka rating hardwood flooring malibu wide plank french oak salt creek 3 8 in t x 6 1 2 in w x. The janka rating is a measure of the wood to resist indentation. The hardness of a timber is measured by the janka hardness test. The janka hardness test from the austrian born emigrant gabriel janka 1864 1932 measures the resistance of a sample of wood to denting and wear.

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. The higher the janka rating number the greater the hardness. The janka hardness scale is a test used to determine the hardness and density of a hardwood timber and bamboo floor. The janka hardness test is the hardness level given to each species.

The janka hardness test is the industry standard for determining the ability of a particular timber species to withstand denting and wear. What is a janka rating. In general terms a medium density timber will have a janka rating of 4 to 8 whilst a high density timber achieves a rating of 8. It measures the force required to embed an 11 28 millimetres 0 444 in diameter steel ball halfway into a sample of wood.

Rating janka 1 7 1 5 7 4 9 5 7 7 5 10 11 9 1 to 9 5 13 to 14 8 8 to 13 9 0 7 2 8 6 moe gpa 1 15 13 15 13 17 17 23 14 to 19 16 to 24 13 to 15 18 22 18 mor mpa 1 118 117 110 117 122 130 150 140 to 144 118 to 181 89 to 115 140 135 147 shrinkage rad tan 1. Even though a janka rating of 8 is considered hard many australian timber species achieve ratings of 12 and above. The higher the janka rating the harder the timber species. The force used is then measured in kn kilonewton as the janka rating.

This test measures the force required to embed an 11 28mm 0 444 in steel ball to half its depth into wood. See also 15 luxe hardwood flooring in massachusetts ideas blog. Hardness is expressed in kilo newtons.