Fire Test Number Fire Rating 1 1.5 2 2.5 3 4    Sound Transmission Class (STC)*   Impact Insulation Class (IIC)* Floor Thickness between (inches) and (inches) Framing Steel Bar Joist Steel C-Joist Steel Open Web Truss Wood Dimensional Lumber Wood I-Joist Wood Parallel Chord Truss (Open Web) Structural Concrete Horizontal Shaft Wall Membrane Complete Revit® Library Download USG Floors Library Revit® is a Registered Trademark of Autodesk® Ceiling Material: Plaster Gypsum Panel Cement Board Acoustical Tile & Grid Drywall Suspension System Floor Material: Gypsum Topping Mixture Structural Cement Panel Concrete Floor Covering: Sheet Vinyl Cushion Vinyl Carpet & Pad Ceramic Tile Engineered Wood Laminate None (No Floor Covering) Other: Insulation Fire Rating: Any 1 Hour 1.5 Hours 2 Hours 2.5 Hours 3 Hours 4 Hours Minimum Sound Rating: STC:  IIC:   Framing Type: Steel Bar Joist Steel C-Joist Steel Open Web Truss Wood Dimensional Lumber Wood I-Joist Wood Parallel Chord Truss (Open Web) Structural Concrete Horizontal Shaft Wall Membrane * USG always recommends the use of a professional acoustical consultant for assistance in determining and achieving appropriate sound performance. Visit NCAC for a list of acousticians in your region.