Very sturdy corner pieces to be inserted into the profile ends.
They are made of heavy gage material and have a special shape providing extra strength to resist the important loads of the 4-bolt connection system and to minimize the necessity of clamps.
Several corner pieces types have been developed to suit your needs and your rectangular duct manufacturing techniques.
Corner "A"
The original and strongest corner piece. The duct-wall needs to be notched out.
Dimensions
Corner "A" with oval Hole
Same characteristics as the A-corner above, but with an oval hole for more flexibility during the assembly. The duct-wall needs to be notched out.
Corner "A" with short Legs
Corners for small duct dimensions. The duct-wall needs to be notched out.
Dimensions
Corner Pieces "S"
Duct-wall seam does not need to be notched out. Although approx. 30% weaker than the A-corners, they are heavy-gage press-formed and stronger than most corner pieces in the market.
Dimensions
Corner "S" with short Legs
Corners for small duct dimensions. Duct-wall seam does not need to be notched out.
Dimensions
Corners "B"
Economical corner pieces. Duct-wall seam does not need to be notched out. Approximately 40% weaker than the A-corners.
Dimensions
Corner Pieces "D"
Economical corner pieces. Duct-wall seam needs to be notched out.
Dimensions
Z-Corner Pieces
Two-Part Corners for formed-on profiles (i.e. FIRMAC) please see Z-Corners