What I’ve done is taken each of the four tests of wood strength (Janka hardness, MOE, MOR, and crushing strength) and found which species were the best and worst in that category, and then use those values as the upper and lower limits. (This is limited to the data I have on hand...
For reference, white oak has a Janka hardness of 1,350 lbf (5,990 N), while the super-hard lignum vitae has a hardness of an astounding 4,390 lbf (19,510 N). (Who could imagine a wood species that is over three times harder than white oak?) On the lower end of the spectrum,...
Any progress to advance such advanced functions requires control on the hierarchical structure of wood as well as the multiscale and multicomponent interactions affecting its elasticity and compressibility. Herein, we review the key structural features, from the molecular to the macroscopic levels, that...
The Wood Coatings Market is expected to reach 3.42 million tons in 2025 and grow at a CAGR of greater than 3.54% to reach 4.07 million tons by 2030. The Sherwin-Williams Company, Akzo Nobel N.V., PPG Industries, Inc., RPM International Inc. and Asian Pai
Acetylation has been approved to improve the durability, resistance to swelling and shrinkage, hardness, and UV resistance (Rowell, 2006a). Acetylation reaction has been extensively commercialized. Titan Wood is the first company to produce acetylated wood with acetic anhydride on a commercial scale,...
Janka Hardness Scale for Wood Flooring Species The Janka hardness test is a measurement of the force necessary to embed a .444-inch steel ball to half its diameter in wood. It is the industry standard for gauging the ability of various species to tolerate denting and normal wear, as well ...
- Commercial wood species database ( density, specific gravity, hardness, shrinkage, ... ). This database contains the means density. The density of wood differs depending on tree species and tree growth environment. - Customize your units: ...
Tree Size:80-100 ft(24-30 m)tall, less than 3-4 ft(1-1.2 m)trunk diameter Average Dried Weight:42.1 lbs/ft3(675 kg/m3) Specific Gravity (Basic, 12% MC):0.52, 0.68 Janka Hardness:1,070 lbf(4,780 N) Modulus of Rupture:12,830 lbf/in2(88.5 MPa) ...
In various wood species, the T/R ratio can range from just over 1, to nearly 3. At a T/R ratio of 1, shrinkage would occur in a perfectly uniform manner across the width and thickness of the board. At a T/R ratio of 3, the flatsawn surface would shrink or swell at triple the...