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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 ...
A common use of Janka hardness ratings is to determine whether a species is suitable for use as flooring. For hardwood flooring, the test usually requires an 80 mm × 150 mm (3 in × 6 in) sample with a thickness of at least 6–8 mm, and the most commonly used test is the ASTM D1037.
Xanthostemon verdugonianus is known to be the hardest Philippine hardwood species. Cutting a 70-cm thick tree with axes normally requires three hours, but cutting a Mangkono tree with the same diameter usually takes two to four days.
The density of dry balsa wood ranges from 40 to 475 kg/m 3, with a typical density around 160 kg/m 3. [5] [6] [7] Balsa is the softest wood ever measured using the Janka hardness test (22 to 167 lbf). [8] The wood of the living tree has large cells that are filled with water. This gives the wood a spongy texture.
The wood is very hard, measuring 5.6 on the Brinell scale and 2,350 lbf (10,500 N) on the Janka scale, approximate measurements of hardness. For comparison, Douglas fir measures 660 lbf (2,900 N), white oak 1,360 lbf (6,000 N), and Brazilian walnut 3,800 lbf (17,000 N) on the Janka scale. It features a tan to salmon color with black accent ...
As well as an export timber source, the wood is graded as first (highest) category in Cambodia. It is a very hard timber and is used to make columns, bridges, sleepers, and for other various construction purposes. [4] Exposed in the open, it may last 10–15 years, though if indoors it may last 50–60 years.
Kanye West Said He Named His Upcoming Album 'Bully' After Learning That His 9-Year-Old Son Saint West 'Kicked' A Child For Being 'Weak'
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; International Wood ...