Raspberry jam acacia has a janka hardness rating of 3100 and a very low 5. Though no wood on the scale has this rating, a rating like this would not make for a good floor. A common use of janka hardness ratings is to determine whether a species. The test also determines how well wood can withstand dents, dings, and wear. The janka hardness test is a measurement of the force necessary to embed a. The scale was created to show the janka hardness test results. Basically, the scale should be used as an overall guide for durability. Forest service list the relative hardness for numerous wood species used in flooring. The janka hardness test from the austrianborn emigrant gabriel janka, 18641932 measures the resistance of a sample of wood to denting and wear. Nov 05, 2007 the janka hardness scale is a measurement of the force necessary to embed a.
Results no difference in janka hardness was found for thickness values of 1, 1. While a harder wood will be more durable, it will also be harder to work with. The janka rating indicates wood strength measured by the force necessary to drive a. Janka events, although mainly used for hardwood species, are often used to measure the density of bamboo floors. Among the hardest woods on the janka chart are brazilian ebony at 3900 poundsforce and southern chestnut at 3540 poundsforce. Hardwood flooring hardness guide janka hardness scale. The janka scale can help you choose an appropriate wood for your project. These ratings were calculated using the janka hardness test, which measures the force needed to embed a. Relative hardness table for domestic and imported woods. Janka hardness chart for exotic wood and domestic wood. Hickory pecan, satinwood 1820 afzelia doussie australian wormy chestnut 1810 bangkirai 1798 rosewood 1780 african padauk 1725 blackwood 1720 merbau 1712 kempas 1710 black locust 1700 highland beech. The janka test measures the amount of force required. Janka hardness scale for wood flooring species county floors.
The janka hardness scale, used to determine whether or not a wood species is suitable for flooring, is the primary test measuring woods resistance to wear and dentability. It is the industry standard for gauging the ability of various species to tolerate denting and normal wear, as well as being a good indication of the effort required to either nail. The actual number listed in the wood profile is the amount of poundsforce lb f or newtons n required to imbed a. All nydree engineered flooring products modified rockwell. Janka hardness scale fossilized the worlds hardest floors. Astm d143 janka section was performed on infused, 2 x 2 x 6 solid pieces of all the wood species nydree uses and the janka hardness results were obtained. The janka hardness test from the austrianborn emigrant gabriel janka, 18641932. Hickory pecan, satinwood 1820 afzelia doussie australian wormy chestnut 1810 bangkirai 1798 rosewood 1780 african padauk 1725 blackwood 1720 merbau 1712 kempas 1710 black locust 1700 highland beech 1686 wenge, red pine, hornbeam 1630 tualang 1624. Janka hardness scale learn how hard each wood species is. Our chart is based on the janka hardness scale which is the industry standard for gauging the ability of various wood species to resist denting and tolerate normal wear. The test computes the pounds of force lbf one requires to drive one 0. Janka hardwood scale this scale is the worldwide standard for gauging the ability of various species of wood to endure normal wear and tear.
Estimating janka hardness from specific gravity for. The janka hardness scale is a measurement of the force necessary to embed a. W and others published janka hardness rating of malaysian timbers find, read and cite all the research you need on researchgate. Currently side hardness, determined using the janka test, is a primary method used to.
The brinell test is very useful for construction materials. Green, research engineer emeritus forest products laboratory, madison, wisconsin introduction in the united states, janka hardness astm d 14394 astm 2006 was initially used as a minimally destruc. The industry standard for hardness the hardness of a wood is rated on an industry wide standard known as the janka test. The janka hardness scale should not be the deciding factor on which wood you will use for floors. The janka scale is used to determine the relative hardness of particular domestic or exotic wood species. Meyers hardness test determined the fundamental measure of violence depending on the average pressure applied to induce reentry. Although not exact, the scale is a good reference for which hardwood can. This force is recorded in both poundsforce lbf and kilonewtons kn. W and others published janka hardness rating of malaysian timbers find, read and cite all the research. The janka hardness test provies a relative scale where the higher the number indicates the harder the wood. Hardness, or janka value is measured with a test of resistance of a sample of wood to denting and wear. The janka hardness test is used to measure the capacity of different species of wood to withstand pressure. The janka hardness test measures the resistance of a sample of wood to denting and wear. F101 janka hardness scale lumber liquidators flooring co.
The janka test was developed as a variation of the brinell hardness test. The janka test is a measure of the hardness of wood. Janka rating system when in doubt about the type of wood to select for your cabinetry, flooring, furniture or millwork project, refer to the janka rating system, which measures the relative hardness of woods. Common red oak with an average janka rating of 1290 is the industry benchmark lor comparing the relative hardness of different wood species bamboo tested on morning star bamboo brand. The janka hardness test measures the resistance of a type of wood to withstand denting and wear. The janka hardness chart was created as a result of the janka hardness test. Types of wood american hardwood information center. Janka hardness chart click to load enlarged pdf file. Janka hardness poundsforce australian buloke 5060 schinopsis balansae quebracho colorado red quebracho 4570 lignum vitae guayacan pockenholz 4500 patagonian rosewood curupay angico preto piptadenia macrocarpa brazilian tiger mahogany 3840 snakewood letterhout piratinera guinensis 3800 brazilian olivewood 3700 brazilian. The higher the number, the harder and generally more durable the wood will be.
Janka hardness scale definition and applications man of. A harder wood will stand up to high traffic or heavy use better than a softer wood, but it will also be more. Common red oak with an average janka rating of 1290 is the industry benchmark lor comparing the relative hardness of different wood species bamboo tested on morning star bamboo brand which uses a more mature bamboo 4 year minimum the most commonly used test to assess the hardness of wood is the janka rating. The janka wood hardness scale woodwudy wholesale flooring. Pdf janka hardness rating of malaysian timbers researchgate. The janka hardness scale starts at zero, with this option being the softest wood choice, making it easy to dent and scratch. Although vertical wood grain edge is tested, the results are not displayed on the janka hardness scale.
Wood hardness chart species alphabetical hardness species by hardness hardness mahogany, honduran 800 padauk 1725 mahogany, santos 2200 tabaccowood 1750 maple, hard north american 1450 rosewood, bolivian 1780 maple, ivory 1500 bamboo, carbonized 1800 maple, soft 999 hickory 1820 merbau 1925 pecan 1820 mesquite 2345 yellowheart 1820. The janka test measures the hardness of wood so that wood species can be compared to one another. A common use of janka hardness ratings is to determine whether a species is continued. Janka hardness scale pdf admin march 1, 2020 leave a comment. The hardness of wood varies with the direction of the wood grain.
This number is given for wood that has been dried to. In the united states, janka hardness astm d 14394 astm 2006 was initially used as a minimally destructive test for estimating the strength and stiffness properties of wood green et al. In laymans terms it is a way to measure a woods resistance to denting. The test consists of measuring the amount of force required to insert a 11. Janka wood hardness chart hosking hardwood flooring. The janka test measures the force required to embed an 11. The janka hardness scale often referred to as the janka hardness list is an industry wide measurement of the hardness of wood. The janka or side hardness test, measures the force poundssquare inch required to embed a. Estimating janka hardness from specific gravity for tropical. Higher ratings on the janka hardness chart indicate stronger wood. The janka hardness scale determines the hardness of a particular type of wood over another.
It is the industry standard for gauging the ability of various species to tolerate denting and normal wear, as well as being a good indication of the effort required to work nail, saw, carve, etc. Measuring a woods flat or horizontal grain face is the most general way to determine its hardness. The higher the force one needs in order to push the ball halfway into the wood, the harder it is. Woods with a higher rating are harder than woods with a lower rating. The scale can be helpful when picking a wood for high traffic areas. The janka hardness test was conducted by measuring the amount of force necessary to embed a. Depending on the room where the flooring will be installed, a certain level of hardness may make it a more desirable choice. Janka hardness chart for exotic wood and domestic wood bell.
The highest rating on the scale is a 4000, making for an extremely hard wood, also not likely suitable for flooring because. The scale was invented in 1906 by gabriel janka, an austrian wood researcher, and standardized in 1927 by the american society for testing and materials. A common use of janka hardness ratings is to determine whether a species is suitable for use as flooring the hardness of wood varies with the direction of. The janka scale is a comprehensive chart of hardness ratings for a huge variety of wood species used for hardwood floors. It is the industry standard for gauging the ability of various species to tolerate denting and normal wear, as well as being a good. The hardest commercially available hardwood is hickory, and it is five times harder than aspen, one of the soft hardwoods.
It is the industry standard for gauging the ability of various species to tolerate denting and normal wear, as well as being a good indication of the effort required to. There may be variations of more or less than 20% on the scale, since this is a scientific test. The test measures the force required to push a steel ball with a diameter of 11. Janka hardness using nonstandard specimens forest products. Janka hardness scale for wood side hardness chart of some woods usda wood. A measure of the hardness of wood, produced by a variation of the brinell hardness test. Estimating janka hardness from specific gravity for tropical and temperate species michael c. The janka side hardness test measures the force required to press an 11. These figures are a good indicator of how resistant the wood is to denting and wear. Janka hardness scale definition and applications man. Where does acacia hardwood fall on the hardness chart. The janka test measures the amount of force required to embed a 0.
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