Nail / Screw Holding
- A measure of how well the wood holds fasteners when a force is applied to the fastener.
Poor: Nails/screws easily pulled out.
Fair: Nails/screws somewhat easy to pull out.
Average: Nails/screws hold well.
Fine: Nails/screws somewhat difficult to pull out.
Excellent: Nails/screws extremely difficult to pull out.
- Characteristics which occur naturally in a tree as it grows, as apparent in a piece of lumber.
Natural Defects Defects that result from how a tree grows such as knots, decay, wind shake, radial cracks, bird peck, etc.
- The "board measure" contents of lumber when calculated from measurements of named sizes; same as gross measure.
- As applied to timber or lumber, the size by which it is known and sold in the market. This often differs from the actual size.
The Wood Glossary