AWC Releases Several Revised Standards
Originally published by: American Wood Council — May 1, 2012
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The American Wood Council (AWC) has revised several of its standards and design tools in response to upcoming changes to Southern Pine design values. The American Lumber Standard Committee (ALSC) Board of Review approved changes to design values for 2"- 4" thick, 2"- 4" wide, Southern Pine #2 Dense and 2x4 Mixed Southern Pine #2, and all lower grades (i.e. #3, Stud, Construction, Standard, and Utility), with a recommended effective date of June 1, 2012 to allow for their orderly implementation. The changes to AWC standards and design tools ensure they remain consistent with the new design values. Visit www.spib.org and www.southernpine.com for more details.
In advance of the implementation date, AWC has developed addenda and other updates to its standards and design tools as follows:
- addendum to NDS® Supplement: Design Values for Wood Construction, to use with 2012 NDS, 2005 NDS, and 2001 NDS;
- addendum to Design Values for Joists and Rafters, to use with Span Tables for Joists and Rafters;
- addendum to 2012 Wood Frame Construction Manual (WFCM) for One- and Two-Family Dwellings; and
- updated online Maximum Span Calculator for Wood Joists & Rafters (Note that all span calculations using AWC's calculator rely on choosing either pre-June 1 or post-June 1 values).