DA 2 - Toenail Connections

4 pages (103 KB PDF)

This Design Aid was developed as supplemental information for the National Design Specification® (NDS®) for Wood Construction to facilitate the design of connections. These tables are based on provisions of the 2001 and later editions of the NDS which are integral to the understanding of the tables.

Frequently Asked Questions

Are there exterior wall/floor intersection details for fire-resistance-rated assemblies?

Details for exterior wall/floor intersections in Type III construction are included in Design for Code Acceptance No. 3 Fire Resistance Rated Wood Frame Wall and Floor Assemblies (AWC DCA-3). The details may be helpful when a one-hour floor ceiling assembly intersects with a two-hour exterior wall in traditional platform construction, if there are concerns about the continuity of the exterior wall rating. The details are accompanied by text which explains the methodology for maintaining the fire resistance of both assemblies. A free download of the updated DCA-3 document can be found here: https://www.awc.org/codes-standards/publications/dca3.