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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 ...
[10] [11] [12] Doerner Fir: Coast Douglas-fir (Pseudotsuga menziesii var. menziesii) 99.7 327 United States Brummit Creek, Oregon [13] [14] Menara: Yellow meranti (Shorea faguetiana) 97.58 320.1 Malaysia Danum Valley Conservation Area, Sabah The original quoted figure of 100.8m was from the top leaves to the bottom of the buttresses on the low ...
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 ...
(Top) 1 Soft woods (coniferous) 2 Hardwoods (angiosperms) 3 Pseudowoods. ... This is a list of woods, most commonly used in the timber and lumber trade. Soft woods ...
The invention of the use of Guaiacum for syphilis. The genus is famous as the supplier of lignum vitae, which is the wood of several species in the genus. [citation needed] It is the fourth-hardest variety of wood as measured by the Janka hardness test, requiring a force of 4,500 lb f (20,000 N) to embed a steel ball 0.444 in (1.13 cm) in diameter half that distance into the wood.
Deodar is the most important timber tree providing soft wood. It can be easily worked and it is moderately strong. It possesses distinct annual rings. It is used for making cheap furniture, railway carriages, railway sleepers, packing boxes, and structural work. Gambar Gmelina arborea: Pale yellow 580 kg/m 3: 980 lb/cu yd Central India, South India
Mangkono has a maximum recorded diameter of around 3.8 ft (1.2 m), and a maximum recorded height of 33 ft (10 m). However most trees rarely exceed 1.6 ft (0.49 m) in diameter and 8 ft (2.4 m) in height. The trunk is usually highly irregular with frequent branching. The bark is slate white in color and has a peeling appearance.
Ironwood is a common name for many woods that have a reputation for hardness, or specifically a wood density that is denser than water (approximately 1000 kg/m 3, or 62 pounds per cubic foot), although usage of the name ironwood in English may or may not indicate a tree that yields such heavy wood.