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  2. Janka hardness test - Wikipedia

    en.wikipedia.org/wiki/Janka_hardness_test

    When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...

  3. Hardwood - Wikipedia

    en.wikipedia.org/wiki/Hardwood

    As the name suggests, the wood from these trees is generally harder than that of softwoods, but there are significant exceptions. In both groups there is an enormous variation in actual wood hardness, with the range in density in hardwoods completely including that of softwoods; some hardwoods ( e.g. , balsa ) are softer than most softwoods ...

  4. Wood flooring - Wikipedia

    en.wikipedia.org/wiki/Wood_flooring

    Wood flooring is a popular feature in many houses. Engineered wood flooring consists of two or more layers of wood adhered together to form a plank. Typically, engineered wood flooring uses a thin layer of a more expensive wood bonded to a core constructed from cheaper wood. The increased stability of engineered wood is achieved by running each ...

  5. Thermally modified wood - Wikipedia

    en.wikipedia.org/wiki/Thermally_modified_wood

    Thermally modified wood is engineered wood that has been modified by a controlled pyrolysis process of wood being heated to (> 180 °C) in an oxygen free atmosphere. This process changes to the chemical structures of wood's cell wall components lignin , cellulose and hemicellulose which decreases its hygroscopy and thus increases dimensional ...

  6. Oak - Wikipedia

    en.wikipedia.org/wiki/Oak

    Oak timber is a strong and hard wood with many uses, such as for furniture, floors, building frames, and veneers. [70] The wood of a red oak Quercus cerris (the Turkey oak) has better mechanical properties than those of the white oaks Q. petraea and Q. robur ; the heartwood and sapwood have similar mechanical properties . [ 71 ]

  7. Is Wood Ash Good for the Garden? 5 Tips for Using This ... - AOL

    www.aol.com/lifestyle/wood-ash-good-garden-5...

    Find out if wood ash is good for the garden and how to use it effectively to fertilize plants. Skip to main content. 24/7 Help. For premium support please call: 800-290-4726 more ...

  8. Lumber - Wikipedia

    en.wikipedia.org/wiki/Lumber

    [46] [47] In addition, wood has a significant CO 2 storage capacity, which limits its release. However, when wood is destroyed (naturally or by combustion), all of the previously stored CO 2 is released into the atmosphere. [48] Natural insulation: lumber is a natural insulator which makes it particularly good for windows and doors.

  9. List of woods - Wikipedia

    en.wikipedia.org/wiki/List_of_woods

    NCSU Inside Wood project Reproduction of The American Woods: exhibited by actual specimens and with copious explanatory text by Romeyn B. Hough US Forest Products Laboratory, "Characteristics and Availability of Commercially Important Wood" from the Wood Handbook Archived 2021-01-18 at the Wayback Machine PDF 916K

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