Birch Lumber

Unedged, no rot, no insect damage, ABC mix grade
Lengths: 1000-3400mm +100mm free trim
Thickness: From 20mm
Width: from 80mm
Measured at the middle of the board from bark to bark
Humidity 8 to 12prc.

Edged, no rot, no insect damage, ABC mix grade
Lengths: 1000-3400mm +100mm free trim
Thickness: From 20mm
Width: from 75mm
Measured at the middle of the board
Humidity 8 to 12prc.

A grade

On the narrow side, no knots,no mold ,no Dark Spots, no damage by insects

Wide side - not more then 1 healthy live knots in 1 meter and the diameter not exede 4cm, no Dark Spots,no damage by insects

B grade

On the narrow side , not more then 2 healthy knots not more then 2 falling knots with diameters not exceeding 4cm,

On the wide side: no mold, no Dark Spots, no damage by insects, core not more then 4cm

C grade

On the narrow side,: core with a diameter exceeding 4cm, no mold, no damage caused by insects.

On the wide side, there may not be: mold, damage caused by insects

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