Apprentice sees flanged duct and is unsure whether the joint is TDC/TDF/Ductmate, how the gasket should sit, and how to pull the duct faces into alignment without forcing the run crooked.
This flanged joint is close but not pretty at the corners. Duct is level/aligned. Do you want cleats, or if cleats are unavailable, 5/16 self-tappers in the flange as the fallback?
Watch out
Do not call for rivets as the normal TDC/Ductmate connection. Do not use corners, bolts, drift pins, clamps, or screws to drag a crooked duct run into place. Do not crush the gasket or flange.
Check
Gasket on one flange face only?
Joining duct brought in level and aligned?
Corners seated?
Cleats available?
Drift pins/C-clamps used only to line up close holes and hold the flange, not force a twisted run?
Steps
Gasket on one flange face only?
Joining duct brought in level and aligned?
Corners seated?
Cleats available?
Drift pins/C-clamps used only to line up close holes and hold the flange, not force a twisted run?
Say this to your foreman
This flanged joint is close but not pretty at the corners. Duct is level/aligned. Do you want cleats, or if cleats are unavailable, 5/16 self-tappers in the flange as the fallback?