Which timber defect runs through the timber rings?

Which timber defect runs through the timber rings?

• A. Shake
• B. Split
• C. Check
• D. Warp

Answer: (B)

A crack that traverses the growth rings is a split. Growth rings form concentric bands from the tree’s early to late wood, and a split is a crack that cuts through these rings, effectively dividing the wood along the grain by crossing the ring structure. This kind of crack typically develops when wood dries or is stressed suddenly, so the material can’t shrink uniformly and a longitudinal separation propagates through the rings. You’ll see the crack cross multiple rings, weakening the cross-section and indicating a notable flaw. In contrast, shakes tend to run along the grain between rings, checks are smaller surface cracks that don’t necessarily go through the full thickness, and warp is a distortion of shape rather than a crack through the rings.

A crack that traverses the growth rings is a split. Growth rings form concentric bands from the tree’s early to late wood, and a split is a crack that cuts through these rings, effectively dividing the wood along the grain by crossing the ring structure. This kind of crack typically develops when wood dries or is stressed suddenly, so the material can’t shrink uniformly and a longitudinal separation propagates through the rings. You’ll see the crack cross multiple rings, weakening the cross-section and indicating a notable flaw. In contrast, shakes tend to run along the grain between rings, checks are smaller surface cracks that don’t necessarily go through the full thickness, and warp is a distortion of shape rather than a crack through the rings.