Deck Lateral Load Connection to a TJI Floor System

The 2024 International Residential Code (IRC) includes provisions for resisting lateral forces of an exterior deck that is attached to a structure. Specifically, 2024 IRC R507.9.2 requires connections at two locations that resist a minimum capacity of 1500 lbs per connection or connections in four locations that resist a minimum capacity of 750 lbs per connection. 

The following two details show methods of properly connecting the deck to Prefabricated Wood I-Joists that are oriented either perpendicular or parallel to the deck framing:

Deck Framing Perpendicular to TJI Joist Floor Framing

Deck Framing Parallel to TJI Joist Floor Framing

For more information refer to the Wood I-Joist Manufacturer's Association or download a copy of the WIJMA Deck Connection Detail.