Grades

OAK

radial

standard

natur

rustic

quartersawn cut

mixed cut

medullar rays are not acceptable

texture is even (variation is no more than 10%)

natural wood colour

without texture selection

even colour scale

colour variation is not acceptable

colour difference not caused by flaws of wood is acceptable

without colour selection

knots are not acceptable

light knots are acceptable up to 3 mm, but no more than 2 knots on a plank

knots are acceptable, but no more than 3 knots on a plank: light knots up 8 mm, dark knots up to 5 mm

knots are acceptable: light knots up to 10 mm, dark knots up to 7 mm, up to 4live knots

sapwood is not acceptable

sapwood up to 10% of plank’s area

sapwood without selection

deviation of fibers from longitudinal axis no more than 10 mm of the plank's width

no selection of fibers deviation

curly grain is acceptable

curly grain without selection

light pinhole D<3 mm is acceptable

up to 2 light and dark pinholes D<5 mm are acceptable

pinholes without selection

cracks at edges, wormholes, rot, margin and edge knots, mechanical defects are not acceptable

tears are not acceptable

small tears are acceptable

WALNUT

select

standard

natur

sound knots are not acceptable

up to 5 knots D<5 mm

knots up to D<10 mm

pinholes D<3 mm are acceptable

up to 5 pinholes are acceptable

pinholes without selection

even colour scale

slight colour variation is acceptable

without colour selection

sapwood is not acceptable

sapwood is acceptable

sapwood up to 10% of plank’s area

cracks at edges, wormholes, rot, margin and edge knots, mechanical defects are not acceptable

humidity 8 - 10%

tears are not acceptable

small tears are acceptable

MAPLE

radial

standard

natur

quartersawn cut

mixed cut

sound knots are not acceptable

up to 2 light knots D<3 mm are acceptable

knots are acceptable: up to 4 light knots D<10 mm, up to 2 dark knots D<7 mm

light pinholes D<1 mm are acceptable

light and dark pinholes D<5 mm are acceptable but no more than 1

pinholes without selection

even colour scale

sharp colour variations are not acceptable

sharp colour variations are acceptable

core wood is not acceptable

deviation of fibers from longitudinal axis no more than 10 mm of the plank's width

no selection of fibers deviation

curly grain is not acceptable

curly grain without selection

black strips are not acceptable

black strips with length up to 10 mm are acceptable

cracks at edges, wormholes, rot, margin and edge knots, mechanical defects are not acceptable

humidity 8 - 10%

tears are not acceptable

small tears are acceptable

ASH

radial

standard

natur

quartersawn cut

mixed cut

light pinholes D<1 mm are acceptable

up to 2 light and dark pinholes D<5 mm are acceptable

pinholes without selection

even colour scale

sharp colour variations are not acceptable

colour without selection

deviation of fibers from longitudinal axis no more than 10 mm of the plank's width

no selection of fibers deviation

curly grain is not acceptable

curly grain is acceptable

black strips are not acceptable

black strips with length up to 10 mm are acceptable

cracks at edges, wormholes, rot, margin and edge knots, mechanical defects are not acceptable

humidity 8 - 10%

tears are not acceptable

small tears are acceptable