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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History Glossary Wood lumber. Testing the cut surface of a stump is called a test of “end hardness”.

Bamboo Flooring Janka Hardness

Lumber stocks tested range from 1″ to 2″ thick. Tropical Jwnka of the World. In Sweden it is in kilograms-force kgfand in Australia, either in newtons N or kilonewtons kN. The Industry Standard for Hardness The hardness of a wood is rated on an industry wide standard known as the Janka test. Alden Softwoods of North America. How Bamboo Flooring is Manufactured. Expansion and Contraction Problems.

What is the janka hardness rating for wood?

Antony Croft October 22, at 1: We have all the information you need to review your wood and find out which wood is best for you. Each wood has been meticulously documented and photographed, listed with its Janka hardness value in lbf and geographic and global hardness rankings. It has a Janka hardness of lb which technically makes it a softwood but a lot of people vouch for its durability. With the rising popularity of bamboo as flooring, the Janka test has been forced to include the diverse ratings for different bamboo floors.

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We have listed some of the most popular choices in wood flooring and included some more exotic species for your reference and comparison.

Who could imagine a wood species that is over three times harder than White Oak? This number is incredibly useful in directly determining how well a wood will withstand dents, dings, and wear—as well as indirectly predicting the difficulty in nailing, screwing, sanding, or sawing a given wood species. Marci July 3, at 5: Janka Hardness Using Nonstandard Specimens. I had a query with regards to Douglas Fir wood.

The Scle hardness test from the Austrian-born emigrant Gabriel Janka, measures the resistance of a sample of wood to denting and wear.

This is one of the best measures of the ability of wood species to withstand denting and wear. The pale blue background indicates species growing in North America.

What size pieces are needed to run a Janka test and where can these tests be carried out? The higher the number the harder the wood. Stability is defined by the level of flux, expansion and “movement” a wood will have when exposed to different humidity levels. Nobody likes dings and dents all over their counters Also, when will this become available again? In Sweden it is in kilograms-force kgfand in Australia, either in newtons N or kilonewtons kN.

A wood’s relative hardness is determined with the Janka Rating System, which measures the force required to drive a. Hardness information is in chapter 5. Overall, the resulting measure is always one of force.

Aspiring wood nerds be advised: Forest Products Laboratory, September This test is one of the best measures of the ability of a wood specie to withstand denting and wear. Save my name, email, and website in this browser for the next time I comment. Retrieved from ” https: 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.

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Frame and panel Frameless construction.

Janka Hardness

Roughly, I would try to stay around the lbf mark. Retrieved 18 March Is there a specific threshold? This page was last edited on 4 Decemberat The test measures the force required to push a steel ball with a diameter of The results are stated in various ways, which can lead to confusion, especially when the actual units employed are often not attached.

Archived from the original on 26 April Janka Hardness Chart listed softest to hardest click for enlarged pdf file. Properties of Seven Columbian Woods. In Janka’s original test, the results were expressed in units of pressure, but when the ASTM standardized the test tentative issue instandard first formally adopted init called for results in units of force. Pine Guy March 30, at 8: Hardwood and softwood labels are somewhat misleading, and have nothing actually to do with the hardness of the wood, but rather to botany.

For years, bamboo was not mentioned in Janka reports and list. Woodworking Woodcarving Wood Hardness tests.

Wood—Determination of static hardness. Blank cells occur where a wood is sold commercially but so far we have found no hardness data.