What is the specific gravity of wood?
where Mmax is maximum moisture content and Gw is the specific gravity of wood substance, equal to approximately 1.54 (Skaar 1988).
What wood has the highest specific gravity?
The top three woods by density are:
- Black Ironwood: A rare wood with a density as high as 1.42 g/cm3 (88 lbs. per cubic foot)
- Itin: a small South American tree related to mesquite: . 98 g/cm3 (61 lbs. per cubic foot)
- African Blackwood: Considered by some to be the original ebony: 1.08 g/cm3 (67 lbs. per cubic foot)
What is the specific weight of wood?
With the specific gravity around 1.5, solid wood “substance”, or lignocellulose as it is commonly called today, weighs around 1500 kg/m3 (93.6 lb/ft3), at theoretical most…
What is specific density of wood?
Density of Wood
| Type of wood: Hard | kg/m3 | g/cm3 |
|---|---|---|
| Mahogany | 497-849 | 0.50-0.85 |
| Maple | 625-753 | 0.63-0.75 |
| Oak | 593-897 | 0.59-0.90 |
| Rosewood | 800-880 | 0.80-0.88 |
Why is specific gravity important in wood?
Wood specific gravity which is a way of expressing how much wood substance is present per unit volume, is the most important within species wood characteristic because knowledge about it allows the prediction of a greater number of properties than any other trait (Zobel and Talbert, 1984; Bowyer and Smith, 1998).
How do you test specific gravity of wood?
Specific gravity for woods is determined by measuring the weight at a specific moisture content level. (The common formula looks like this: Wg = Wd(1 + M/100) and will be fairly consistent within a species.) This numerical value, as mentioned earlier, is actually a comparison to pure water.
Is hickory denser than oak?
The Janka scale rates hardness or density of hardwoods: the higher the number, the harder or more dense the wood. Hickory is the hardest of the three types with a rating of 1,820. White oak is second with a rating of 1,360. Red oak is the softest of the three at 1,290.
Is hickory dense?
On average, Hickory is denser, stiffer, and harder than either White Oak or Hard Maple. The wood is commonly used where strength or shock-resistance is important.
Is hickory the hardest wood?
Wood Properties of Hickory It is considered an extremely durable wood, thought to be able to withstand nearly anything. On the Janka scale, hickory comes in at an impressive 1820. That’s about 41% harder than the traditional Red Oak. It is the second hardest hardwood species in North America.
What is the density of soft wood?
Properties of softwood
| Property | Pine | |
|---|---|---|
| Moisture content (%) | II | 12 |
| Basic density (kg/m3) | II | 420 |
| Density (kg/m3) | II | 470 |
| Tensile strength (MPa) | II | 104 |
Why is it important to determine the specific gravity of wood?
Is hickory wood heavy?
Hickory wood is heavy, hard, strong, dense and shock resistant, and this blend of traits is not found in other commercial woods. Hickory wood has a Janka* hardness rating of 1820.
What is special about hickory wood?
Hickory wood is heavy, hard, strong, dense and shock resistant, and this blend of traits is not found in other commercial woods. Hickory wood has a Janka* hardness rating of 1820. Hard maple comes in at 1450 while white oak holds a 1360 rating.
Which is stronger oak or hickory?
Hardness and Durability As the hardest domestic wood, hickory obviously outshines both red and white oak in terms of durability. Softer woods may dent or scratch beneath careless footfalls, but hickory is more likely to withstand the abuse. This makes it an ideal choice in homes with a lot of activity and traffic.
Is Hickory a hardwood or softwood?
hardwoods
The hardest of all domestic hardwoods, hickory has a ranking of 1820 on the Janka scale. This makes it a tough and durable option for your flooring.
What is specific gravity of wood?
Specific gravity is a simple ratio between the weight of wood and the weight of water. For instance, the typical dried weight of a cubic-foot of Hard Maple is 45 lbs. and the weight of a cubic foot of water is 62.38 lbs.
Is Hickory a hardwood?
Comments: Hickory is among the hardest and strongest of woods native to the United States. On average, Hickory is denser, stiffer, and harder than either White Oak or Hard Maple. The wood is commonly used where strength or shock-resistance is important.
How strong is shagbark hickory?
Shagbark Hickory. The strength characteristics of Hickory are influenced considerably by the spacing of its growth rings. In general, wood from faster-growing trees, with wider spaced growth rings, tends to be harder, heavier, and stronger than wood from slower-growing trees that have rings which are closer together.
What is the difference between Hickory and white oak?
On average, Hickory is denser, stiffer, and harder than either White Oak or Hard Maple. The wood is commonly used where strength or shock-resistance is important. Shagbark Hickory falls into the True-Hickory grouping, and is considered to be a ring-porous wood.