Which timber defect is described as cracks that run through the timber rings?

Which timber defect is described as cracks that run through the timber rings?

• A. Shake
• B. Surface check
• C. Split
• D. Warp

Answer: (C)

Cracks that pass through the growth rings are splits. A split is a deep crack that travels through the wood from one end to the other (or through the thickness), cutting across the annual rings. It often forms as the timber dries and internal stresses cause the grain to separate, compromising strength along the whole piece. By contrast, a surface check is a shallow crack on the surface, a shake runs along the grain within the wood between rings, and warp refers to distortion like bow, crook, or twist.

Cracks that pass through the growth rings are splits. A split is a deep crack that travels through the wood from one end to the other (or through the thickness), cutting across the annual rings. It often forms as the timber dries and internal stresses cause the grain to separate, compromising strength along the whole piece. By contrast, a surface check is a shallow crack on the surface, a shake runs along the grain within the wood between rings, and warp refers to distortion like bow, crook, or twist.