TDF - Transverse Duct Flange
The connect flange is formed from the same sheet as of the duct to avoid any joint between the duct and flange. The duct is dispatched from factory with one corner inserted on one side and another corner to be inserted at site for assembling the duct.
  Unique TEF eliminates connectors in the field  
  Spot welding and frame assembly are eliminated  
  Compatible to other types of companion flanges  
  Less labor in field and gained cost efficiencies  
 Drive Cleat