What do plums and wood have in common? Probably more than you thought. In this video Marlene Cramer explains the basic idea of timber grading using plums.
You do not need your own plums, but it may enhance your experience.
If you want to find out more, you can read this quick summary of timber grading or go right into the detail with the journal paper “Strength grading of sawn timber in Europe: an explanation for engineers and researchers”. You an see an example in the conference paper “Some thresholds for grading British grown spruce to optimised strength classes using longitudinal resonance”.