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American Wood Council

Please understand that AWC cannot provide engineering services other than those related to the standards we develop. Alternatively, we do provide a Design Professional Member database that is searchable by area of expertise and geographic location.

2015 Span Tables for Joists and Rafters

The 2015 Span Tables for Joists and Rafters updates the 2012 edition and provides a simplified system for determining allowable joist and rafter spans for typical loads encountered in one- and two-family dwellings and is referenced in the 2015 International Building Code and 2015 International Residential Code.

A tutorial for using the span tables is also available.

 
2015 Design Values for Joists and Rafters

A companion Supplement to Span Tables for Joists and RaftersDesign Values for Joists and Rafters tabulates allowable bending (Fb) and modulus of elasticity (E) design values for visually graded and mechanically graded dimension lumber.

This edition has been updated to the 2015 NDS Design Values Supplement. Changes include new design values for Southern Pine and Mixed Southern Pine design values.

 
2012 Span Tables for Joists and Rafters

The 2012 Span Tables for Joists and Rafters updates the 2005 edition and provides a simplified system for determining allowable joist and rafter spans for typical loads encountered in one- and two-family dwellings and is referenced in the 2012 International Building Code

A tutorial for using the span tables is also available.

 
2012 Design Values for Joists and Rafters

A companion Supplement to Span Tables for Joists and RaftersDesign Values for Joists and Rafters tabulates allowable bending (Fb) and modulus of elasticity (E) design values for visually graded and mechanically graded dimension lumber.

This edition has been updated to the 2012 NDS Design Values Supplement. Changes include new design values for Coast Sitka Spruce and Yellow Cedar and updates to Northern Species design values.

 

If there is a change to lumber design values in 2012, affected AWC design standards and design aids would be amended accordingly. Once amended, electronic versions of those documents will be available on the AWC website. To ensure that those downloading this document can be made aware of any updates, this version of2012 Design Values for Joists and Raftersis password protected.

 
2005 Span Tables for Joists and Rafters

Span Tables for Joists and Rafters, 2005 Edition updates the 1993 edition below and provides a simplified system for determining allowable joist and rafter spans for typical loads encountered in one- and two-family dwellings. 

A tutorial for using the span tables is also available

 
 
(Pricing for Span Tables and Design Values for Joists and Rafters 2005 Combo)
Non-member $14.00
Member/Student* $12.00

* Qualified students are those who are full-time students enrolled in a wood design course at a university or college.

OR Download PDF for Free
2005 Span Tables for Joists and Rafters
(47 pages, 331 KB PDF)

2005 Design Values for Joists and Rafters

A companion Supplement to Span Tables for Joists and Rafters, Design Values for Joists and Rafters tabulates allowable bending stress (Fb) and elastic modulus (E) values for visually graded and mechanically graded dimension lumber. 

This edition has been updated to the 2005 NDS Supplement Design Values.

 
 
(Pricing for Span Tables and Design Values for Joists and Rafters 2005 Combo)
Non-member $14.00
Member/Student* $12.00

* Qualified students are those who are full-time students enrolled in a wood design course at a university or college.

OR Download PDF for Free
2005 Design Values for Joists and Rafters
(25 pages, 204 KB PDF)

ABOUT SOUTHERN PINE VALUES

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 to allow for their orderly implementation.

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

AWC has also developed recommended amendments to span tables for new construction designed in accordance with ICC model building codes.

For more information, visit www.spib.org and www.southernpine.com.

 
1986 Wood Structural Design Data with 1992 Revisions

(270 pages, 9.7 MB PDF) August 2009

Wood Structural Design Data, 1986 Edition, provides information related to design of typical wood structural members. These data are augmented by reference to the National Design Specification for Wood Construction, particularly on the subject of design stresses. Tabular data in this volume are presented as a convenient aid in design of most frequently encountered elements of wood structural framing.

 
 

Non-member $​​50.00
Member/Student* $​25.00

* Qualified students are those who are full-time students enrolled in a wood design course at a university or college.

To complete your download of Wood Structural Design Data, you will need a copy of the 2005 NDS Design Values for Wood Construction Supplement.

 

Looking for Span Tables for Random Length Decking?

Check out these free document downloads:
WCD 2 - Tongue and Groove Roof Decking
WCD 4 - Plank-and-Beam Framing for Residential Buildings

 
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