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Wood and Timber - Theory & Concepts - Wood Shrinkage

Structure, properties, defects, and preservation of wood as a construction material.

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Wood Shrinkage vs. Moisture Content

Wood shrinks dimensionally only when its Moisture Content (MC) drops below the Fiber Saturation Point (FSP), typically around 30%. Shrinkage is highly anisotropic: it is greatest tangentially across the growth rings, about half as much radially, and negligible longitudinally (along the grain).

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