Publication Updates

NLGA Standard Grading Rules For Canadian Lumber

Current Edition – December 2022

Supersedes all previous Editions, Revisions and Supplements

Many of the GR revisions were editorial and/or related to formatting including:

  • Edits to clarify text and added references to applicable Interpretations.
  • Titles added to all Paragraph numbers and sub-paragraphs consecutively renumbered.
  • Tables reformatted and diagrams updated and harmonized.

In addition, the following amendments were made:

  • Updates to the NGR paragraphs and NGR Interpretations as per the 2018 NGR edition.
  • Ratified responses incorporated into the GR and Interpretations as per the Rat Response TG recommendations.
  • New Para. 128a and NLGA Interpretation 2.7.4 with reference to MSR residual lumber.
  • Norway spruce updates as per the 2017 NLGA GR – Supplement No. 1
  • Inclusion of Supplements Nos. 2 to 5 published since 2017
  • Updates to the EU Annex

Current Edition – August 2017

This version has been superseded by the December 2022 edition.

This edition incorporates revisions to the species and species groups covered by the NLGA Grading Rules.

2017 Edition Supplements

The following Supplements to the NLGA Standard Grading Rules for Canadian Lumber (2017 edition) were issued on March 1, 2019.  Please click on the applicable link for a PDF copy.

Supplement No. 1:  add Canadian-grown Norway spruce (Paras. 7, 7a, 7b, 905i, 905j, 905l)

Supplement No. 1 to NLGA Grading Rules (2017 edition) – March 2019

Supplement No. 2:  update Machine Graded Lumber provisions (Paras. 128, 128a, 128b)

Supplement No. 2 to NLGA Grading Rules (2017 edition) – March 2019

Supplement No. 3:  revise NGR Glossary (Para. 700) and NGR Interpretations

Supplement No. 3 to NLGA Grading Rules (2017 edition) – March 2019

Supplement No. 4:  update EU Annex provisions

Supplement No. 4 to NLGA Grading Rules (2017 edition) – March 2019

January 2014 Edition

This version has been superseded by the August 2017 edition.  The 2014 revision primarily incorporated changes to the knot and slope of grain grading rules for Beams & Stringers and Posts & Timbers as well as including the errata and other supplements from the December 2010 edition.

December 2010 Edition

This version has been superseded by the August 2017 edition.  Listed below are the errata and supplements issued for the December 2010 edition. These errata and supplements are provided for archival information only.

Special Products Standards – Current Editions

The following is a list of the current editions of the Special Products Standards which are available for ordering in the Publications For Sale section or for download in the Publications For Download section of the website.

English Editions

  • SPS 1 – Fingerjoined Structural Lumber – current edition March 2017
  • SPS 2 – Machine Graded Lumber – current edition April 2019
  • SPS 3 – Fingerjoined “Vertical Stud Use Only” Lumber – current edition March 2017
  • SPS 4 – Fingerjoined Machine Graded Lumber – current edition November 2014
  • SPS 5 – Face-Glued Lumber – Vertical Use Only – current edition November 2015
  • SPS 6 – Structural Face-Glued Lumber – current edition November 2015
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