One-Hour Combustible Floor-Ceiling and Roof-Ceiling Assemblies

These details are available in both two-dimensional and three-dimensional formats. Click on the links below to view the details

• Two-Layer Floor System with Joists
  • 19/32" T&G APA plywood underlayment, 15/32" APA wood structural panel subfloor
    • 3-Dimensional Detail
    • 2-Dimensional Detail
  
  
  • Lightweight or gypsum concrete topping, 15/32" APA wood structural panel subfloor
    • 3-Dimensional Detail
    • 2-Dimensional Detail


• Single-Layer Floor System with Joists
  • 3-Dimensional Detail
  • 2-Dimensional Detail


• Single-Layer Floor Systems with I-Joists or Trusses
  • Min. 23/32" T&G APA Sturd-I-Floor Glued and nailed to I-Joist, 0.026" galvanized steel hat-shaped furring channels, max 16" 0.c
    • 3-Dimensional Detail
    • 2-Dimensional Detail
  
  
  • Min. 23/32" T&G APA Sturd-I-Floor Glued and nailed to I-Joist, 0.019" galvanized steel resilient channels max. 16" o.c.
    • 3-Dimensional Detail
    • 2-Dimensional Detail
  
  
  • Min. 23/32" T&G APA Sturd-I-Floor, 0.019" galvanized steel resilient channels max. 16" o.c., 1x4 wood setting strips
    • 3-Dimensional Detail
    • 2-Dimensional Detail
  
  
  • Min. 23/32" T&G APA Sturd-I-Floor, 0.019" galvanized steel resilient channels max. 24" o.c.
    • 3-Dimensional Detail
    • 2-Dimensional Detail
  
  
  • Min. 23/32" T&G APA Sturd-I-Floor, Two layers ½" Type X gypsum wallboard taped
    • 3-Dimensional Detail
    • 2-Dimensional Detail
  
  
  • Min. 23/32" T&G APA Sturd-I-Floor, 0.019" galvanized steel resilient channels max. 16" o.c., Two layers ½" Type X gypsum wallboard taped
    • 3-Dimensional Detail
    • 2-Dimensional Detail



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Because APA has no control over quality of workmanship or the conditions under which engineered wood products are used, it cannot accept responsibility of product performance or designs as actually constructed. Consult your local jurisdiction or design professional to assure compliance with code, construction, and performance requirements.

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