| After
form |
| Round
knot - Knot where the ratio between the maximum diameter and the minimum
diameter is smaller than 2. |
Oval knot
- Knot where the ratio between the maximum diameter and the minimum
diameter is bigger than 2 and smaller than 4. |
| Splay (spike)
knot - Knot where the ratio between the maximum diameter and the minimum
diameter is bigger than 4. |
|
|
| After
position on timber piece' s surface |
| Face
knot - Knot located on lumber / timber' s face. |
Longitudinally
knot - Oval or spaly knot whose biggest diameter is aproximate parallel
with the longitudinally axle of timber piece. |
| Transversally
knot - Oval or spaly knot whose biggest diameter is aproximate perpendicularry
on the longitudinally axle of timber piece. |
Edge
knot - Knot located and visible on the edge of the timber piece. |
| Arris
knot - Knot located and visible on the timber piece arris. |
Traversing
spaly knot - Knot passing from a face to the other face and from an
edge to the other edge. |
|
| After
grouping mode |
| Scattered
knot - Knots located, one by another, at a distance bigger than timber
piece width or at a distance of minimum 150 mm at timber pieces with width
over 150 mm. |
Group (cluster)
knot - Knot located on a surface with the length not surpassing the
width of timber piece - for timber pieces with width under 150 mm - or
150 mm in the case of timber pieces with over 150 mm width. |
Branched
knots - Two knots on timber piece' s face, oval or splay, located
simetrically at the longitudinally axle of timber piece. |
|
| After
the degree of adherence to the surrounding wood |
| Intergrown
knot - Knot with adherence to the surrounding knot on minimum 3/4 of
its perimeter. |
Partially
intergrown - Knot with adherence to the surrounding knot between 1/4
and 3/4 of its perimeter. |
| Dead knot
- Knot with adherence to the surrounding knot on maximum 1/4 of its perimeter. |
|
|
| After
the degree of health |
| Sound
knot - Knot without rottenes and alteration traces. |
Light knot
- Healthy knot whose color is similar with the color of the surrounding
wood. |
| Dark knot
- Healthy knot whose color is darker than the color of the surrounding
wood. |
Unsound
knot - Knot rotten on maximum 1/3 of its surface. |
| Rotten
knot - Knot rotten on more than 1/3 of its surface. |
|
|
All terms
without *) are according to ISO 1029-1974, ISO 1031-1974, ISO 2299-1973
and ISO 2300-1973.
|
