LEESBURG, VA -- American Wood Council (AWC) has released updated Span Tables and Design Values for Joists and Rafters in order to reflect the 2015 International Building Code (IBC) and 2015 International Residential Code (IRC).
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. It is referenced in the 2015 IBC and IRC.
A companion Supplement to Span Tables for Joists and Rafters, Design 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 lumber.
The American Wood Council (AWC) is the voice of North American wood products manufacturing, representing over 75 percent of an industry that provides approximately 400,000 men and women with family-wage jobs. AWC members make products that are essential to everyday life from a renewable resource that absorbs and sequesters carbon. Staff experts develop state-of-the-art engineering data, technology, and standards for wood products to assure their safe and efficient design, as well as provide information on wood design, green building, and environmental regulations. AWC also advocates for balanced government policies that affect wood products.
Both the span tables and design values can be downloaded at: www.awc.org/technical/spantables/index.php.