Under Classification: GRADE 0 - GRADE 2 - GRADE 3 - GRADE 4

TIMBER FEATURES GRADE 1 KNOTS ON THE FACES Knots - sound intergrown max.: 10 % of the width of the piece + 20 mm Knots - dead or partially intergrown max.: 10 % of the width of the piece + 10 mm Knots - encased max.: 10 % of the width of the piece Knots - loose or unsound not permitted Number of knots (on the worst linear metre for knots) 4 knots max. ...loose or unsound 0 ...spike and splay 0 KNOTS ON THE EDGES: G4 Knots sound max.: 90 % of the thickness of the piece max.: max. permitted on the face Knots - dead or partially intergrown max.: 67 % of the thickness of the piece max.: max. permitted on the face Knots - bark ringed loose or unsound max.: 33 % of the thickness of the piece max.: max. permitted on the face Number of knots (on the worst linear metre for knots) 2 knots max. ...loose or unsound 1 knot max. ...spike and splay 0 knot OTHER FEATURES OF THE STRUCTURE Bark ringed max. number: 2 on the worst linear metre total length 100 mm Resin pocket max. number: 4 on the worst linear metre total length 100 mm Compression wood max.: 10 % of the surface Abnormal slope of grain not permitted