JANKA HARDNESS SCALE PDF

The Industry Standard for Hardness The hardness of a wood is rated on an industry wide standard known as the Janka test. The Janka test measures the force. The Janka Scale is a comprehensive chart of hardness ratings for a huge variety of wood species used for hardwood floors. Learn how to read it and how it. The Janka scale is used to determine the relative hardness of particular domestic or exotic wood species. The Janka test measures the amount of force required.

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Lumber stocks tested range from 1″ to 2″ thick. This test is one of the best measures of the ability of a wood specie to withstand denting and wear. It is one of the best gardness to determine the hardness and durability of wood species. So, this would measure the ability of a wood be bulletproof?

Scalf Janka Hardness Scale rating has become the industry standard for determining whether a given wood is suitable for flooring material. Retrieved from ” https: Retrieved 18 March In the United Scwle, the measurement is in pounds-force lbf.

Pine Guy March 30, at 8: Skip to main content. I had a query with regards to Douglas Fir wood. BPS October 22, at 2: These woods tend to take on moisture quicker than other species, so these floors should be installed immediately upon arriving at your home. Maple and Hickory however are two species, that are not to be acclimated in your home. Angiosperms are referred to as hardwoods, while gymnosperms aka conifers are softwoods. Statistics below compare the janka hardness ratings for hardwood scxle bamboo flooring products.

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The most common use of Janka hardness ratings is to determine whether a species is suitable for use as flooring.

It is also a good indicator of how scxle a species is to saw or nail. Certain woods need to be dried longer in the mill, and some also need to be acclimatized in your home, to create a more stable presence. Tropical Timbers of the World.

In Sweden it is in kilograms-force kgfand in Australia, either in newtons N or kilonewtons hardnes. No information on contributors is available for this page.

What is the janka hardness rating for wood?

The results are stated in various ways, which can lead to confusion, especially when the actual units employed are hafdness not attached. How Stable is Your Wood? This is one of the best measures of the ability of wood species to withstand denting and wear. Forest Products Lab, January Where would you draw the line for the hardness? The test measures the force required to push a steel ball with a diameter of Janka Hardness Using Nonstandard Specimens.

End testing is also sometimes done that is, testing the cut surface of a stump would be a test of end hardness. Green, Marshall Begel and William Nelson.

Janka hardness test – Wikipedia

In Sweden it is apparently in kilogram-force kgfand in Australia, Janka hardness ratings are either in newtons N or kilonewtons kN. Expansion and Contraction Problems. This method results in an indention square millimeters in size.

The Janka scale rates the relative hardness of wood. It measures the force required to embed an Douglas fir works out great for wood working benches. The results are stated in various ways, which can lead to confusion, especially when the name of the actual units employed is often not attached. The hardness of a wood is rated on an industry wide standard known as the Janka test. Who could imagine a wood species that is over three times harder than White Oak? Red Oak, which has a Janka rating ofis the industry benchmark for comparing the relative hardness of different wood species.

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The pale blue background indicates species growing in North America. As you explore our wood janma for your home, feel free to refer back to this chart to see where your wood choice ranks on the hardness scale.

Sometimes the results are treated as units, e. Depending on where the wood is harvested the results may vary. Wood as an Engineering Material.

Janka Hardness

February 4, at 8: In the United States, the measurement is in pounds-force. In Sweden it is in kilograms-force kgfand in Australia, either in newtons Jnaka or kilonewtons kN.

Marci July 3, at 5: Plank construction and finish are also important factors when determining the durability and ease of maintenance of any wood floor. Archived from the original on 26 April I had a question — At what measure of hardness hardneds a wood classified as a hardwood or softwood? There is a standard deviation associated with each species, but these values are not given. Douglas fir provided a good stable surface to work on. Properties of Seven Columbian Woods. Forest Products Laboratory, September