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RELATIVE HARDNESS OF SELECTED WOOD FLOORING SPECIES
(Ranked by Janka hardness rating)
The Janka (or side) hardness test measures the forcerequired to embed a .444 - inch steel wall to half its diameter in wood. It is one of the best measurements of the ability of a wood species to withstand denting and wear. By the same token, it is also a good indicator of how hard or easy a species is to saw or nail. Northern Red Oak, for example, has a Janka hardness rating of 1290. Brazilian Cherry, with a rating of 2350, is nearly twice as hard. If you're accustomed to working with Red Oak and decide to tackle a job with Brazilian Cherry, you can expect it to be much harder to cut and nail.
Source: Hardness ratings for most species taken from Wood Handbook: Wood as an Engineering Material (Agriculture Handbook 72, Forest Product Laboratory, Forest Service U.S. Department of Agriculture; revised 1987). Except for Australian Cypress, Wenge, African Padauk, Merbau and Santos Mahogany, which were provided by International Hardwood Flooring; Heart Pine by Mountain Lumber and Mesquite by Mesquite Products of Texas.
Douglas Fir rating is an average of ratings for coast, Interior West and Interior North species.
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