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Plywood shortened classification

Plywood shortened classification by surface apperance

Deciduous plywood (hardwood)– EN – 635 – 2

Class

Characteristics of permissible defects

I

Sound irtergrown knots up to 15 mm ø, but not more than 30 mm cumulative ø/m2

Filled unsound knots up to 6 mm ø and in the amount of up to 2 pcs/ m2

Filled splits up to 1/10 of panel Iength, 3 mm ø, 3 pcs/m

Wooden plugs up to 3 pcs/ m2

Slight discoloration

Defects at the edges up to 2 mm

II

Sound irtergrown knots up to 35 mm ø

Filled unsound knots and knot holes up to 10 mm and in the amount of 3 pcs/ m2

Filled splits up to 5 mm width, 1/5 of panel Iength, 3 pcs/m

Wooden plugs up to 6 pcs/ m2

Slight discoloration

Defects at the panel edges up to 5 mm

III

Sound irtergrown knots up to 50 mm ø

Filled unsound knots and knot holes up to 40 mm ø

Filled splits up to 20 mm width, 1/3 of panel Iength, 3 pcs/m

Plugs

Discoloration

Glue penetration up to 5% of panel surface

Sanding through up to 1% of panel surface

Defects at the edges up to 5 mm

IV

With many defects, not repaired

Coniferous plywood (softwood)– EN – 635 – 3

Class

Characteristics of permissible defects

I

Sound irtergrown knots up to 15 mm ø, but not more than 30 mm cumulative ø/m2

Filled unsound knots up to 6 mm ø and in the amount of up to 2 pcs/ m2

Filled splits up to 1/10 of panel Iength, 3 mm ø, 3 pcs/m

Wooden plugs up to 5 pcs/ m2

Slight discoloration

Defects at the edges up to 2 mm

II

Sound irtergrown knots up to 50 mm ø

Filled unsound knots and knot holes up to 25 mm and in the amount of 6 pcs/ m2

Filled splits up to 10 mm width, 1/3 of panel Iength, 3 pcs/m

Plugs

Slight discoloration

Defects at the panel edges up to 5 mm

III

Sound irtergrown knots up to 60 mm ø

Filled unsound knots and knot holes up to 40 mm ø

Filled splits up to 15 mm width, 1/2 of panel Iength, 3 pcs/m

Plugs

Discoloration

Glue penetration up to 5% of panel surface

Sanding through up to 1% of panel surface

Defects at the edges up to 5 mm

IV

With many defects, not repaired

Requirements are adjusted to the client’s individual needs.