Oct 8, 2025 · In the US, Janka hardness is measured in pounds-force (lbf) and typical ratings range from 70 lbf for balsa to 5,000 lbf of Australian Buloke. Douglas Fir has a Janka hardness rating of 660 lbf, …

Jan 10, 2024 · Douglas Fir Janka hardness rating of 660 lbf. Douglas Fir is a softwood species with a medium hardness level, commonly used for carving furniture and other large objects.

The Janka Side Hardness test measures the force required to press an 11.28mm (0.444 inch) steel ball to half its diameter cross-grain into a block of wood. This force is recorded in both pounds-force (lbf) …

Nov 4, 2025 · Douglas fir rates 660 lbf—harder than pine but still in the softwood range. The increased density provides better nail-holding and wear resistance while remaining reasonably easy to work …

The study included determining the effect of thickness on Janka hardness as well as a critical analysis of historical data and information on various factors that might affect Janka hardness.

Common Name (s): Douglas-Fir, Doug Fir, DF Scientific Name: Pseudotsuga menziesii Distribution: Western North America Tree Size: 200-250 ft (60-75 m) tall, 5-6 ft (1.5-2 m) trunk diameter Average …

I have amassed over 500 wood species on a single poster, arranged into eight major geographic regions, with each wood sorted and ranked according to its Janka hardness.

This chart shows the wood hardness, also known as the Janka scale, of all popular wood species used in decking, siding and flooring applications.

Aug 4, 2023 · Douglas Fir is a softwood with Janka hardness rating of 710 lbf (3,158 N) which is relatively lower than most wood. Douglas Fir comes from a coniferous tree like other softwoods that …

Douglas Fir, a relatively soft wood, has a Janka hardness rating of 660 lbf. Brazilian cherry, a very hard wood, has a rating of 2350 lbf, while Brazilian walnut has a hardness rating of 3800 lbf.