Codes and Standards Addenda and Amendments Related to Design Value Changes

AWC Standards Addenda

The American Lumber Standard Committee (ALSC) Board of Review has approved changes to design values for all grades and all sizes of visually-graded Southern Pine and Mixed Southern Pine lumber with a recommended effective date of June 1, 2013. For more information, visit and

AWC has developed addenda and other updates to use with new construction designed in accordance with its standards and design tools as follows:

2013 Addenda for Design Values with June 1, 2013 Effective Date. These addenda supersede those published in the 2012 addenda:

Publications Updates/Errata

A comprehensive list of updates and errata for AWC Standards and Design Tools are available here.