Azjatyckie normy drewna

	Width	Length	Clear cuttings	Sapwood	Knots	Spring	Warp (other than spring)	Minimum cuttings
PRIME	6 inches and up	6 feet and up	91 % of cuttings exempt of defects	Must be excluded from clear face cuttings	The average diameter of any sound knot shall not exceed 1/3 the width of the face on which it appears.	Must not exceed 1 inch per 12 feet of the piece’s width	Not admitted if sufficient to prevent the whole piece from surfacing two sides to standard surfaced thickness.	4 inches x 5 feet or 5 inches x 4 feet
SELECT	5 inches and up	6 feet and up	75 % of cuttings exempt of defects	Bright sapwood may be included in clear face cuttings unless it exceeds in the aggregate 1/3 the width of the piece or is present on both faces.	Same as for PRIME	Same as for PRIME	As in Prime grade provided that slightly warped pieces 10″ and wider are admitted if they can be ripped to produce 2 pieces each of which would grade Select and then not contain warp which would prevent those 2 pieces from surfacing two sides to standard surfaced thickness.	4 inches x 3 feet or 3 inches x 4 feet
STANDARD	4 inches and up	6 feet and up	66 % of cuttings exempt of defects	Bright sapwood may be included in clear face cuttings.	The average diameter of any sound knot shall not exceed 1/2 the width of the face on which it appears.	Shall not exceed the proportion of 1″ per 8′ of length of the piece	Not admitted if sufficient to prevent the clear face cuttings from surfacing two sides to standard surfaced thickness should they be removed from the piece	4 inches x 2 feet or 3 inches x 3 feet
SOUND or BHND	BHND : Borer Holes No Defect As for Prime, Select and Standard grades except that pin and unstained shot holes are admitted in the cuttings
	Width	Length	Clear cuttings	Wane	Brittle heart	Spring and warp	Recommended cuttings
SERVICEABLE	4 inches and up	6 feet and up	66 % of cuttings exempt of defects	Allowed on the worse face and one edge only, as follows: in widths 6″ and up it should not exceed 1/6 the width of the piece – and in widths less than 6″, it should not exceed 1/8 the width of the piece.	Allowed on one face and edge only provided that the strength of the piece is not materially affected	Same as in STANDARD	4 inches x 2 feet or 3 inches x 2 feet

SELECT AND BETTER	SELECT and PRIME
STANDARD AND BETTER	STANDARD, SELECT and PRIME
SOUND AND BETTER	SOUND, STANDARD, SELECT and PRIME
MERCHANTABLE (or SERVICEABLE AND BETTER)	SERVICEABLE, SOUND, STANDARD, SELECT and PRIME