Sawn wood from Sweden is visually graded according to “NORDIC TIMBER Grading Rules”, which is approved by the sawmill organisations in Sweden, Norway and Finland.
The sawn timber, Pine or Spruce, is divided into grades according to the quality features. The grades are I, II, III, IV, V, VI and VII or also called A, B, C and D . For each of the grades the following features are specified: Number and sizes of knots, fissures and wane and other features. No numerical values are given for grade VII or D.
GRADE A is divided into four sub-grades A1, A2, A3 and A4.
PHOTOS SHOWING PERMITTED KNOT STRUCTURE OF GRADES I-VI or A, B and C.
The darker photos on the left side show Pine and the photos to the right show Spruce.
GRADE I or A1
GRADE II or A2
GRADE III or A3
GRADE IV or A4
GRADE V or B
GRADE VI or C