Information Hardwood


Janka Imported Print E-mail
{tab=What is Janka Hardness of Imported Wood Species?}

Janka hardness for imported wood species The Janka Hardness of Imported Wood species measures the force required to push a steel ball with a diameter of 11.28 millimeters (0.444 inches) inside the wood to a depth of half the ball's diameter (the diameter was chosen to produce a circle with an area of 100 square millimeters). In the Janka's original test, the results were expressed in units of pressure, but when the ASTM standardized the test (tentative issue in 1922, standard first formally adopted in 1927), it called for results in units of force.{/tabs}

Janka Hardness of Imported wood species is the industry standard for gauging the ability of various wood species to tolerate denting and normal wear, as well as being a good indication of the effort required to either nail or saw the particular wood.

In the United States, the measurement is in pounds-force(lbf) . The hardness of wood usually varies with the direction of the grain remember that is usually 3 popular wood cuts plain sawn, quarter sawn and rift sawn . If the Janka Hardness test is done on the surface of a wood plank, with the force exerted perpendicular to the grain, the test is said to be of "side hardness." Side hardnesses of a block of wood measured in the direction of the tree's center (radially) and on a tangent to the tree's rings (tangentially) are typically very similar. End testing is also sometimes done (that is, testing the cut surface of a stump would be a test of end hardness). The most common use of Janka hardness ratings is to determine whether a species is suitable for use as wood flooring or contruction frame. Moisture Content is always a variant on any janka hardness test or table this mean that, side hardness increases with decreasing moisture content. In short in the Janka hardness The higher the number, the harder the wood.




Imported wood species types


Bambo or Scientific Name: Phyllostachys vivax Properties: Bamboo is a renewable resource due to its short growth time requirement. It only takes about four years from planting to harvest time to prepare it for flooring applications. This flooring also has the added benefit of being highly resistant to moisture absorbtion. Therefore if humidity is an issue, bamboo flooring offers a material which will remain true in shape. Janka Hardness: 1180

Brazilian Cherry or Scientific Name: Hymenaea courbaril
Properties: In addition to its warm reddish tint, this moderately lustrous wood is notable for its hardness and durability jatoba is extremely dense wood and very strong. Janka Hardness: 2350

Bubinga or Scientific Name: Guibourtia spp
Properties: Bubinga wood is durable and has a natural resistance to termites. This species requires time and care to dry properly. If adequate time is not provided, warping can occur. The wood is not reported to have any distinctive odor. Janka Hardness: 2690

Cork or Scientific Name: Quercus suber)
Properties: Cork species do not usually have a high resistance to decay, but they do have a propensity to absorb preservatives rather well. The wood commonly has no odor. Most Cork are not difficult or time consuming to dry properly. Janka Hardness: 380

Curmaru or Scientific Name: Un/know
Properties: Works well, but is very hard use carbide blades and bits. Janka Hardness: 3540

Cypress or Scientific Name: Callitris glauca
Properties: This species grows in a semi-arid area of Australia, which bestows on it the unique property of being the only commercial softwood that is actually harder than red oak — making it superior for both residential and commercial use. Because of its relative hardness and excellent durability, Australian cypress wood flooring has very good dimensional stability; however, in actual installations, significant movement can sometimes be seen. Janka Hardness: 1375

Gum spotted or Scientific Name: Eucalyptus maculata
Properties: Spotted gum has a high natural resistance to decay. The wood remains smooth under friction and is reported to a slight citrus-like odor. Spotted gum dries fairly easily. Janka Hardness: 2473

Gum Sidney or Scientific Name: Eucalyptus saligna
Properties: Sydney blue gum wood is very hard and tough, and moderately durable. This species can take some time to dry properly to prevent checking and warping. Janka Hardness: 2023

Iroko or Scientific Name: Chlorophora spp
Properties: Iroko is a very heavy, strong, durable wood. It is hard and stiff, with excellent shock-resistance. Janka Hardness: 1260

Jarrah or Scientific Name: Eucalyptus marginata
Properties: Jarrah is very hard and durable, with a bending strength much greater than that of Mahogany. It has moderate resistance to decay when not chemically treated. The wood remains smooth under friction and is reported to be odorless. Amendoim is a dimensionally stable wood flooring species. Janka Hardness: 1910

Mahogany (santos) or Scientific Name: Myroxylon balsamum
Properties: Mahogany is known for its strength and beauty, and it has outstanding durability. Given its hardness and color-fastness, santos mahogany is a superior choice to genuine Honduran mahogany (Swietenia macrophylla), which it closely resembles in color. In fact, although genuine mahogany is traditionally chosen for fine furniture and millwork, it is seldom used in wood flooring because it lacks sufficient hardness to withstand constant foot traffic. Janka Hardness: 2200

Maple (Brazilian) or Scientific Name: Acer saccharum
Properties: Like black maple (B. nigrum), maple is classified as a hardwood (other species of maple are considered soft). And like teak and white oak, it has a high crushing strength. It is stiff, strong, dense, and extremely tough, with excellent shock resistance. It is notably resistant to abrasive wear; and for this reason, it is the hardwood flooring of choice for such high-traffic/hard-use locations as bowling alleys, basketball courts, and other sports facilities. Janka Hardness: 1500

Merbau or Scientific Name: Intsia biuga / Intsia palembanica spp
Properties: Merbau is almost as stable as teak. And although comparable to hickory in strength, merbau has a much lower density. It has excellent dimensional stability and is highly resistant to termites. Janka Hardness: 1925

Oak (Tasmanian) or Scientific Name: Eucalyptus delegatensis
Properties: Tasmanian oak does not have a natural resistance to decay, and lacks any noticable odor. Tasmanian oak requires some care to dry properly as checking can occur. Janka Hardness: 1350

Padauk or Scientific Name: Pterocarpus soyauxii
Properties: Harder and more stable than northern red oak, padauk is heavy and strong and has an average to high durability. It has excellent weathering qualities and is highly resistant to decay. Janka Hardness: 1725

Purpleheart or Scientific Name: Peltogyne spp.
Properties: Purpleheart is a very hard, dense, strong wood, with excellent dimensional stability. It is very resistant to dry-wood termites. Janka Hardness: 2890

Sapele or Scientific Name: Entandrophragma cylindricum
Properties: Sapele is quite durable and seasons rapidly, but with a marked tendency to warp, so careful stacking is required. Janka Hardness: 1510

Teak (Brazilian) or Scientific Name: Tectona grandis
Properties: Teak has a high resistance to decay and termite attack. In fact the oil secreted by the wood is reported to be a natural insect repellant. The wood remains smooth under friction and is reported to have the odor of leather when freshly cut. Chestnut is diffuclt and time consuming to dry properly. Janka Hardness: 3540

Walnut brazilian Ipe or Scientific Name: Juglans nigra
Properties: the wood is heavy, hard, and stiff and has excellent dimensional stability. It is moderatly dense, but very strong, with good shock resistance. Janka Hardness: 3680

Wenge or Scientific Name: Millettia laurentii
Properties: Like black maple (B. nigrum), maple is classified as a hardwood (other species of maple are considered soft). And like teak and white oak, it has a high crushing strength. It is stiff, strong, dense, and extremely tough, with excellent shock resistance. It is notably resistant to abrasive wear; and for this reason, it is the hardwood flooring of choice for such high-traffic/hard-use locations as bowling alleys, basketball courts, and other sports facilities. Janka Hardness: 1500

 
Janka Hardness Domestic Print E-mail
{tab=Janka Hardness of Domestic Wood Species} Domestic janka hardness scale Janka Hardness of Domestic wood species is the industry standard for gauging the ability of various wood species to tolerate denting and normal wear, as well as being a good indication of the effort required to either nail or saw the particular wood.
{/tabs}
{slide=The Janka Hardness of Domestic Wood species measures} the force required to push a steel ball with a diameter of 11.28 millimeters (0.444 inches) inside the wood to a depth of half the ball's diameter (the diameter was chosen to produce a circle with an area of 100 square millimeters).{/slide}

{slide=In Janka's original test} the results were expressed in units of pressure, but when the ASTM standardized the test (tentative issue in 1922, standard first formally adopted in 1927), it called for results in units of force.The results for the janka hardness are stated in various ways in different countries, which can lead to confusion, especially when the name of the actual units employed is often not attached. In the United States, the measurement is in pounds-force(lbf) .{/slide}

{slide=The hardness of wood usually varies} with the direction of the grain remember that is usually 3 popular wood cuts . If the Janka Hardness test is done on the surface of a wood plank, with the force exerted perpendicular to the grain, the test is said to be of "side hardness." Side hardnesses of a block of wood measured in the direction of the tree's center (radially) and on a tangent to the tree's rings (tangentially) are typically very similar. End testing is also sometimes done (that is, testing the cut surface of a stump would be a test of end hardness). {/slide} The most common use of Janka hardness ratings is to determine whether a species is suitable for use as wood flooring or contruction frame.
Moisture Content is always a variant on any janka hardness test or table this mean that, side hardness increases with decreasing moisture content. In short in the Janka hardness The higher the number, the harder the wood. {tab=Domestic wood species}{/tabs}

{slide=Ash White or Scientific Name: Fraxinus americana } Properties: White ash is elastic and hard, and it has excellent shock-resistance. The wood remains smooth under friction. Janka Hardness: 1320 {/slide} {slide=Beech or Scientific Name: Fagus grandifolia} Properties: Beech is frequently used in factory floors and other high-traffic areas, since it wears well and stays smooth when subjected to repeated friction. The wood is hard and elastic, with excellent shock-resistance. Janka Hardness: 1300{/slide}

Birch or Scientific Name: Betula spp.
Properties: Birch is a very heavy, strong, durable wood. It is hard and stiff, with excellent shock-resistance. Janka Hardness: 1260

Cherry (Black) or Scientific Name: Prunus serotina

Properties: A strong but moderately hard wood with excellent shock resistance, black cherry is generally considered too soft for an entire floor; mainly it is found in borders and accents. Janka Hardness: 950

Douglas Fir or Scientific Name: Pseudotsuga menziesii

Properties: Douglas Fir has little natural resistance to termites or decay, and as such should be treated as a preventative measure. The wood remains smooth under friction and is reported to have no odor. Douglas Fir dries rapidly with little degrade resulting from the process. Janka Hardness: 710

Hickory-Pecan or Scientific Name: Carya spp. Properties: Prized for their resiliency, both hickory and pecan wood are exceedingly high in shock resistance, and they rank as the hardest of all North American hardwoods. Their combination of stiffness, toughness, hardness, and durability can be found in no other commercial wood, which is why they are used when an extremely hard and durable wood floor is desired. Janka Hardness: 1820

Maple Sugar-Hard or Scientific Name: Acer saccharum
Properties: Like black maple (B. nigrum), sugar maple is classified as a hardwood (other species of maple are considered soft). And like teak and white oak, it has a high crushing strength. It is stiff, strong, dense, and extremely tough, with excellent shock resistance. It is notably resistant to abrasive wear; and for this reason, it is the hardwood flooring of choice for such high-traffic/hard-use locations as bowling alleys, basketball courts, and other sports facilities. Janka Hardness: 1450

Mesquite or Scientific Name: Prosopis spp

Properties: In addition to its warm reddish tint, this moderately lustrous wood is notable for its hardness and durability Mesquite is extremely dense wood and very strong. Janka Hardness: 2345

Red Oak or Scientific Name: Quercus rubra Properties: White oak is slightly harder than red oak, and also more durable. However, both types are notably stiff and dense, have high shock resistance, and resist wear. Because of the high concentration of tannic acid in white oak, it is particularly resistant to fungi and insects. Janka Hardness: 1290

Pine Antique-Heart or Scientific Name: Carpinus betulus Properties: Pine species do not usually have a high resistance to decay, but they do have a propensity to absorb preservatives rather well. The wood commonly has no odor. Most pine species are not difficult or time consuming to dry properly. Janka Hardness: 1225

Pine Southern-Yellow or Scientific Name: Pinus taeda Properties: Pine species do not usually have a high resistance to decay, but they do have a propensity to absorb preservatives rather well. The wood commonly has no odor. Most pine species are not difficult or time consuming to dry properly. Janka Hardness: 870

Pine Antique-Heart or Scientific Name: Carpinus betulus Properties: Pine species do not usually have a high resistance to decay, but they do have a propensity to absorb preservatives rather well. The wood commonly has no odor. Most pine species are not difficult or time consuming to dry properly. Janka Hardness: 1225

Walnut American Black or Scientific Name: Juglans nigra Properties: This is one of the most prized of North American hardwoods. Although American black walnut is somewhat softer than northern red oak, the wood is heavy, hard, and stiff and has excellent dimensional stability. It is moderatly dense, but very strong, with good shock resistance. Walnut is one of the most durable of the domestic commercial woods, even under conditions favorable to decay. Janka Hardness: 1010



 
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Every child should have a friendly place to play; their playgrounds should be safe, attractive and inviting. Unfortunately limited community funds often lead to neglected and unsafe playgrounds. That's why Oakland Wood Floors spends time improving East Bay area playgrounds. Employees from Oakland Wood Floors can give playgrounds a face-lift, increase the safety of equipment and make the area more inviting to youngsters.It is part of their vision for a better world that makes our workers take their gifts into the community. Once they roll up their sleeves and apply their know-how, it is a snap for Oakland Wood Floor employees to turn playgrounds into exciting, safer places for children in the community. It just makes sense to take our expertise in home projects and apply it to those in need. Working with the community, we know our employees can bring joy to many children.

If an East Bay area playground needs help, please email us at This e-mail address is being protected from spambots. You need JavaScript enabled to view it . Our employees will meet with you to discuss how we can improve your playground. Then we will work with you to turn dreams into reality.

Every child should have a welcoming and safe home. Certainly single mothers want their children to enjoy playing in a safe haven, but limited budgets, time and lack of resources keep single mothers from fixing up their homes. That's why Oakland Wood Floors is committed to improving needy 'single mom' families' living quarters. Our employees work with these moms, providing the labor and expertise that is needed to turn a house into a home. As you can imagine, Oakland Wood Floors' employees are some of the best in the business - it’s a pleasure for them to help "single mom" families.

If you are one of these hard-working single moms, or you know someone who is please contact us at oaklandwoodfloors.net. We will work with you to improve the quality of life for single moms and their children. Employees from Oakland Wood Floors want to extend a helping hand, one family at a time. In addition to our volunteer work in playgrounds and in the homes of single mothers, Oakland Wood Floors is committed to expanding its vision of volunteer service. Perhaps your nonprofit knows of needs in the East Bay area that we can fill. We know there are many needs that nonprofits can identify. Certainly there are needy families that we might serve if contacted. If you have such knowledge and/or if you wish to work with us, then please contact us by email at  This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Help us as we expand our vision of community service. This ideal is something that Oakland Wood Floors as a company and as employees feel must be part of our work in the world. If you are aware of a worthy project, please email us at This e-mail address is being protected from spambots. You need JavaScript enabled to view it . Together we can make the world a better place for everyone.

 
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