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The Janka hardness test (English: / ˈ dʒ æ ŋ k ə /; [1] German:), created by Austrian-born American researcher Gabriel Janka (1864–1932), measures the resistance of a sample of wood to denting and wear. [citation needed] It measures the force required to embed an 11.28-millimeter-diameter (7 ⁄ 16 in) steel ball halfway into a sample of ...
Hemlock (Tsuga) Eastern hemlock ... bottle tree (Entandrophragma caudatumi) ... Janka hardness test; List of Indian timber trees;
Lignum vitae is hard and durable, and is also the densest wood traded (average dried density: ~79 lb/ft 3 or ~1,260 kg/m 3); [4] it will easily sink in water. On the Janka scale of hardness, which measures hardness of woods, lignum vitae ranks highest of the trade woods, with a Janka hardness of 4,390 lbf (compared with Olneya at 3,260 lbf, [5] African blackwood at 2,940 lbf, hickory at 1,820 ...
Red oak rings in at a 1290 on the Janka scale (the higher the number, the stronger the board), and white oak comes in at 1360. Durability: Thanks to the wood’s open grain, wood stains take ...
The tree is essentially evergreen throughout most of its native range. It is shade-tolerant. It fruits between the age of 30 and 70 years over the summer months in the Northern Hemisphere. [3] The wood is hard, heavy and self-lubricating, and has a Janka Hardness Score of 4500, [8] which is one of the hardest in the
In the riparian habitats surrounding streams, hemlock trees provide shade to keep the water cool during the summer, allowing cold-water fish like brook trout to thrive (https://bit.ly/3I3sbcQ ...
The trees typically reach 40 m (130 ft) in height and 1.8 m (5 ft 11 in) in trunk diameter. [6] The wood is very hard, measuring 3,684 lbf (16,390 N) on the Janka scale. The wood is also fragrant [7] with hints of nutmeg and cinnamon (also a member of the Lauraceae). [citation needed]
The wood is extremely hard, being one of the hardest woods in Northern America with a Janka hardness test of 1,700 lbf (7,560 N) [46] and specific gravity of 0.733 (733 kilograms per cubic metre or 45.7 pounds per cubic foot).