Wood

Type
Description

Checks

radial cracks in wood caused from non-uniform volume changes and decreased moisture

Glu-Laminated Lumber

wood that is composed of an assembly of wood laminations

Heartwood

the darker central portion in the wood cross-section

Knots

flaws in wood associated with portions of branches that are impacted into the main body of a tree

Sapwood

the lighter outer portion of the wood cross-section

Sawn Lumber

wood that is cut directly from a log

Shakes


cracks in wood that are parallel to the annual ring

Splits

completely separated wood fibers