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Steve Nix

Interpreting Lumber Grade Stamps

By September 3, 2012

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I've always been puzzled by the hieroglyphics stamped on lumber and other forest products. Good news is there is some rhyme and reason for the stamp and several lumber associations have interpretations of the process

According to the Northeast Lumber Manufacturers Association, there is a voluntary standard where "the grade marking shall consist of a minimum of five elements to assist the consumer in identifying the (1) Moisture Content, (2) Product Grade, (3) Species or Species Grouping, (4) ALSC-Accredited Supervisory Agency, and (5) Unique Mill Number ID or Mill Name.

The big boys who use the stamps are listed here: The Forest Products Industry


May 8, 2009 at 10:26 am
(1) Ron Scott says:

What is a method, other than heavy sanding, to reove the grade labels on exterior exposed HT lumber? Thank you

August 13, 2009 at 9:31 am
(2) john says:

Please advise the proper method to remove the stamp, other than sanding.

September 10, 2012 at 11:07 am
(3) DIANA LEWIS says:

as usual some links don’t work

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