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When testing hardwood flooring, the direction of the grain will determine the result of the testing. For example, testing with force perpendicular to the grain results in what is called a plank's “side hardness.”
The Janka hardness test is a method used to determine the wood's hardness. The higher the number of the test, the harder the wood is, and the more resistant to a saw or nail it is.
Another test is called “end testing,” when the force is exerted against the surface of a stump of wood. Typically, wood's side hardness is less strong than its end hardness. Since you'll be installing wood side-up, pay closer attention: Hardness ratings are to determine whether a species is suitable for use as flooring.
|Sheri Ann Richerson|