Summary

 
Summary of US hardwood lumber grades

FASFAS 1 FACESELECTSNo.1 CommonNo.2A & 2B Common
Minimum Board size6" x 8'Same as FAS for species being graded4" x 6'3" x 4'3" x 4'
Minimum Cutting Size4" 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.