BACK GRADES,Red and White Oak pLYWOOD,Grading Rules AND Descriptions, Grading Standards,inspection checklist ,quality control ,sourcing service ,Testing ,quality assurance,QC,GRADERS,INSPECTORS

BACK GRADES

	Sound Tight Knots	Knotholes	Repaired Knots	Sound Tight Burls	Mineral/Sap	Rough Cut	Splits or Joints
1	MAX 16 (UP TO 1/4″)	NO	NO	YES	YES/YES	TWO 8″ DIA. AREAS	SIX 1/8″ X 12″ REPAIRED
2	MAX 16 (8 UP TO 1/4″)	ALL REPAIRED	8 TO 1/2″	YES	YES/YES	YES	SIX 3/16″ X 12″ REPAIRED
3	MAX 16 (8 UP TO 1/4″)	ALL 3/8″ TO 1″	NO⁽¹⁾	YES	YES/YES	YES	3/8″ X 1/4 LOP
4	YES	UP TO 4″	NO	YES	YES/YES	YES	1″ TO 1/4 LOP, 1/2″ TO 1/2 LOP, 1/4″ TO FULL LOP

(1) May be obtained repaired, if specified
LOP = Length Of Panel