Squaring Up Rough Lumber
In the above video, and in the below 10 steps, I teach one of the most basic and essential skills in traditional woodworking: how to square, flatten, & dimension your own rough lumber into finished boards. To build quality traditional furniture, you need to start with perfectly flat and square lumber. The Janka hardness test is the international standard for measuring the resistance of a sample of wood to denting and wear. It's expressed in psi, or pounds-per-square-inch. The test measures the pressure required to embed an mm in) diameter steel ball into wood to half the ball's diameter.5/5.

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