UL Designs & Thickness — Floor Assemblies


Click here for Roof Assemblies and Columns

 categoryDescriptionUL design LinkUL PDFCAD DrawingUnrestrained thickness tablerestrained thickness table
 
Unprotected Floor/Ceiling 
      
  CellularD925UL PDFDWGD925N708
  NWC FlutedD925UL PDFDWGN852N852
  LWC FlutedD925UL PDFDWGN782N852
 Non-Load Restricted2-1/2" NWC, FlutedD985UL PDFDWGN782N852
 Non-Load Restricted2-1/2" LWC, FlutedD985UL PDFDWGN782N852
 Non-Load Restricted4-1/2" NWC 2HR only, FlutedD985UL PDFDWGN852 4 1/2" tableN852 4 1/2" table
 
Unprotected Future Floor/Ceiling ​
      
  NWC, Fluted/Cellular D925UL PDFDWGD925 FF NWCD925 FF NWC
  LWC, Fluted/Cellular D925UL PDFDWGD925 FF LWCD925 FF LWC
 
Beam/Unprotected Floor Substitution
      
  CellularN708UL PDFDWGN708 Cellular UnN708 Cellular Re
 Non-Load RestrictedNWC, FlutedN852UL PDFDWGN852N852
 Non-Load Restricted4-1/2" NWC 2HR only, FlutedN852UL PDFDWGN852 4 1/2" tableN852 4 1/2" table
 Non-Load RestrictedLWC, FlutedN852UL PDFDWGN852N852
  NWC, FlutedN782UL PDFDWGN782N782
  LWC, FlutedN782UL PDFDWGN782N782
  Castellated BeamN784UL PDFNAN784N784
  Joist SubstitutionN854UL PDFDWGRefer to DesignRefer to Design
 Non-Load RestrictedJoist Substitution N854UL PDFDWGRefer to DesignRefer to Design
 Non-Load RestrictedTube Steel (HSS)GCP/CF 194-01PDFNARefer to DesignRefer to Design
 
Protected Floor/Ceiling 
      
  2 1/2" NWC/LWC, Fluted/CellularD739UL PDFDWGD739N782
  2" NWC/LWC, Fluted/Cellular D743UL PDFDWGD743S750
  2 1/2" LWC, FlutedD779UL PDFDWGN782N782
  2 1/2" NWC, FlutedD779UL PDFDWGN782 NWC UnN782
  Corrugated DeckD780UL PDFDWGD780S750
  3 1/4" LWC, FlutedD782UL PDFDWGN782 unN782 Re
  4 1/2" NWC, FlutedD782UL PDFDWGN852 4 1/2" tableN852 4 1/2" table
 Non-Load Restricted2-1/2" NWC, FlutedD798UL PDFDWGN852 LWC UnN852
 Non-Load Restricted2-1/2" LWC, FlutedD798​UL PDFDWGN852N852
 
Beam Protected Floor Substitution ​ 
      
  Beam Supporting Cellular Deck NWCN706UL PDFNAN706N706
  Beam Supporting Cellular Deck LWCN706UL PDFNAN706N706
  Beam Supporting Fluted DeckN782UL PDFDWGN782 unN782 Re
 Non-Load RestrictedBeam Supporting Fluted DeckN852UL PDFDWGN852N852
  Joist SubstitutionN854UL PDFDWGRefer to DesignRefer to Design
 Non-Load RestrictedTube Steel (HSS)GCP/CF 194-01PDFNARefer to DesignRefer to Design
 
Concrete Decks 
      
  Concrete Slab with Concrete Beam SupportJ701UL PDFNARefer to DesignRefer to Design
  NWC Slab with Beam SupportJ709UL PDFDWGN852N852
  NWC Slab with Beam SupportJ712UL PDFDWGN782N782
  Concrete Hollow Core Slab with Beam SupportJ957UL PDFDWGJ957S735**
  Tube Steel (HSS)GCP/CF 194-01PDFNARefer to DesignRefer to Design

*Per UL N or S series design may be substituted for beams in D and J series designs
** Final Design is dependent on overall concrete thickness

Click here for explanation of Future Floors

 

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Last Updated: 2025-01-09

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