“Nordic Timber Grading Rules” book is a Nordic set of commercial grading rules for Pine (Pinus sylvestris) and Spruce (Picea abies).
The grading evaluates the properties of all four sides of sawn timber.
The main grades are U/S (Unsorted), V (Fifths), VI (Sixths) and VII (Sevenths or Domestic Sixths),
Structural timber must be strength graded. This standard identifies the characteristic values and defines the quality requirements for visual strength grading of timber.
The grades are organised in descending order: T3 – T2 – T1 – T0. Glulam grading uses the strength grades LT40, LT30, LT20 and LT10.
