| Categories of defects |
Permissible amount of defects
|
| Pin knots light |
Permitted with
total quantity not more than 3 per sq. m
|
| Sound intergrown knots |
Permitted up
to an individual maximum diameter of 15 mm
with total quantity not more
than 5 per sq. m
|
| Other knots |
Permitted up
to an individual maximum diameter of 6 mm
with total quantity not more
than 3 per sq. m
|
| Knots and knot holes repairement |
Not permitted
|
| Closed checks |
Permitted for
an individual maximum length up to 200 mm
and in number up to 2 per
meter of a panel width
|
| Open checks |
Not permitted
|
| Irregularities in the structure
of the wood |
Permitted
|
| Hearth and discoloration |
No more than
5% of the surface
|
| Defects at the edges due to
sanding or sawing |
Permitted up
to 2 mm from the edge
|
| Glue penetration |
Not permitted
|
| Sanding through |
Not permitted
|
| Veneer overlapping in inner
plies |
Not permitted
|
