Summary

Summary of US hardwood lumber grades
	FAS	FAS 1 FACE	SELECTS	No.1 Common	No.2A & 2B Common
Minimum Board size	6" x 8'	Same as FAS for species being graded	4" x 6'	3" x 4'	3" x 4'
Minimum Cutting Size	4" x 5' 3" x 7'	Best face of board must be grade FAS Poor face of board must be grade No 1 Common		4" x 2' 3" x 3'	3" x 2'
Minimum Yield	Surface measure x 10 83 ¹/₃%			Surface measure x 8 66 ²/₃%	Surface measure x 6 50%
Formula to Determine Number of Clear Cuttings	(Surface measure)4			(Surface measure+1)3	(Surface measure) 2

Notes:

This chart summarises the main requirements for the standard grades. For complete information, consult the appropriate section of the NHLA Rule Book.
For kiln dried lumber, ½" shrinkage is permitted for the minimum size board in each grade.
No. 2A Common requires clear cuttings.
No. 2B Common is a utility grade requiring cuttings to be sound.
When specified for export shipment, a comparison can be made respectively between export grades of PRIME and COMSEL with the NHLA grades of FAS and No. 1 Common. It is necessary to consult with your supplier as to the exact specification being applied to these export grades.