Single-Layer Floor Systems with I-Joists or Trusses: Minimum 23/32" Tongue & Groove APA Sturd-I-Floor, Two Layers 1/2" Type X Gypsum Wallboard Taped, 3-Dimensional Detail
Typical Detail
This detail shows a single-layer wood I-joist floor system with 23/32" T&G APA rated sheathing and two layers of 1/2" gypsum wallboard ceiling providing a fire-rated assembly in CAD format. Developed by APA – The Engineered Wood Association, this detail is drawn from APA publication Fire-Rated Systems, Form W305 and reflects decades of engineered wood research, testing and field-proven best practices.
This 2D detail is designed for architects, engineers, contractors and building professionals and provides clear, code-compliant guidance.
Available in multiple formats including DWG (AutoCAD), RVT (Revit), and PDF, this detail helps building professionals streamline the design and construction process while ensuring structural integrity and proper installation of engineered wood products.
Published by APA — The Engineered Wood Association.
