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the boards are classified into various groupings
It is sought after for its figure
std and high stiffness
representing less of any tree's life (say 60 years
Sitka Spruce - Sonically Graded Size:Classic the boards are classified intoSonic grading is fundamentally different from traditional grading because the process relies on data and mathematical models to classify each board, this helps us to be much more accurate than what eyes only grading can do. By evaluating density, stiffness, Q (damping) and several other factors, the boards are classified into various groupings. Every sonically graded board is required to meet the following specifications: Density in the range of 350
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