Janka Hardwood Scale Acacia

The janka hardness test measures the lb in2 required to embed a 444 inch steel ball to half its diameter in wood.

Janka hardwood scale acacia.

Below is an illustration that shows what the janka hardness test looks like. You can read more about the janka scale and see a list of the janka hardness ratings from findanyfloor here. Acacia mangium more commonly known as black wattle in the us has a 1750 janka hardness rating and is dried to 12 percent moisture for use as flooring. The janka rating indicates wood strength measured by the force necessary to drive a 444 millimeter steel ball halfway into a plank.

The scale was invented in 1906 by gabriel janka an austrian wood researcher and standardized in 1927 by the american society for testing and materials depending on the room where the flooring will be installed a certain level of hardness may make it a more desirable choice. It is one of the best measures of the ability of a wood species to withstand denting and wear. On the janka hardness chart big leaf acacia rates 1700 pounds force while small leaf acacia rates 2200 pounds force and both fall roughly in the middle of the chart. When testing wood in lumber form the janka test is always carried out on wood from the trunk of the tree known as the heartwood and the standard sample according to astm d143 is at 12 moisture content and clear of knots.

For hardwood flooring the test usually requires a 2 6 sample with a thickness of at least 6 8mm and the most commonly used test is the astm d1037. 13 trendy hardwood flooring hardness scale acacia unique janka hardness scale logs end janka hardness rating scale for hardwood floors wood flooring hardness chart trinity products archives page 15 of 18 lumber liquidators blog products archives page 15 of 18 lumber liquidators blog 40 antique elegant bamboo flooring ideas for your home janka scale wood hardness evergreen hardwood floors. The testing is done on the surface of the plank and the force is exerted perpendicular to the grain which means that the test collects side hardness data. It is also a good indicator of how hard or easy a species is to saw or nail.

The janka hardness scale rates the hardness of hardwood flooring and bamboo as well. Raspberry jam acacia has a janka hardness rating of 3100 and a very low 5 4 percent volumetric shrinkage rate.