Benefit From Janka Wood Hardness Rating

Published: 11th December 2006
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What is Janka Wood Hardness Rating?



Janka Wood Hardness Rating is a relative measurement of the wood's impact-resistance and wear-resistance, an evaluation of its hardness. The higher the rating, the harder is the species of wood.



Applications Of Janka Wood Hardness Rating



Janka Wood Hardness Rating being the numerical representation of the wood's durability (its ability to withstand denting and wearing) it is easy to select a wood-species depending on the use it is being put to. Thus, softer woods with lower ratings will not be fit for flooring-use as it will dent and scuff easily. You will need high-rated durable wood for high-traffic floors. Even engineered flooring materials can be rated by Janka testing.



Janka Wood Hardness Rating is a good indicator how easy or difficult it is to hammer a nail into the wood or to hack it down with a saw and this is certainly a great help for many do-it-yourselfers.



How Is The Rating Done?



Janka Wood Hardness Rating is done by undertaking the Janka test, which involves measuring the amount of force (in pounds per square inch or psi) required to drive in an 11.28 millimeter (i.e., 0.444 inch) steel ball to half its diameter into the wood sample. A series of tests are conducted and averaged to arrive at the correct rating. (These tests include sampling plain-sawn and quarter-sawn wood materials).







Wood Species Rating



Eastern White Pine 380



Basswood 410



White Pine 420



Hemlock 500



Chestnut 540



Larch and Alder 590



Douglas Fir 660



Yellow Pine 700



Shedua 710



Sycamore 770



Parana 780



Cumaru 790



Tamarack 800



Lacewood, Leopardwood 840



Southern Yellow Pine 890



Cedar 900



Paper Birch 910



Boire 940



Black Cherry 950



Sakura 995



Black Walnut 1010



Boreal 1023



Makore 1100



Brazilian Eucalyptus 1125



Cocobolo 1136



Teak 1155



Carbonized Bamboo 1180



Heart Pine 1225



Movingui 1230



Yellow Birch and Red Oak 1260



Caribbean Heart Pine 1280



American Beech 1300



Ash 1320



Ribbon Gum 1349



Tasmanian Oak 1350



White Oak 1360



Australian Cyprus 1375



Natural Bamboo 1380



Coffee Bean 1390



Merbau 1400



Hard Maple / Sugar Maple 1450



Sweet Birch 1470



Curupixa 1490



Sapele / Sapelli 1510



Kambala 1540



Peroba 1557



True Pine / Timborana 1570



Zebrawood 1575



Tualang 1624



Wenge / Red Pine 1630



Highland Beech 1686



Locust 1700



Kempas 1710



Merbau 1712



Blackwood 1720



African Padauk 1725



Rosewood 1780



Bangkirai 1798



Afzelia / Doussie 1810



Bamboo 1800



Hickory, Pecan and Satinwood 1820



Tigerwood 1850



Purpleheart 1860



Jarrah 1910



Amendoim 1912



Tallowwood 1923



Cameron 1940



Bubinga 1980



Sydney Blue Gum 2023



Karri 2030



Brushbox 2135



Pradoo 2170



Santos Mahogany / Cabrueva 2200



Mesquite 2345



Brazilian Cherry / Jatoba 2350



Spotted Gum 2473



Red Mahagony / Turpentine 2697



Bloodwood 2900



Angelim Pedra 3040



Brazilian Redwood / Peraju 3190



Ebony 3220



Brazilian Teak 3540



Brazilian Walnut / Ipe / Lapacho 3684


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