Hot dipped galvanized sheets undergo roll forming that indents multiple beads down the length of the sheet starting at 6″ off the edge and then on one foot centers. The bead acts to strengthen the finished duct and according to SMACNA can be a substitute for cross breaking the duct. In addition to making the sheet stronger, the bead reduces deflection of the duct and therefore acts as a noise dampener (reduces oil canning) when the duct system is running.
Item Codes:
GSB28G36120F 28 Ga 36 x 120 Galv. BEADED
GSB28G4896F 28 Ga 48 x 96 Galv. BEADED
GSB28G48120F 28 Ga 48 x 120 Galv. BEADED
GSB26G3696F 26 Ga 36 x 96 Galv. BEADED
GSB26G36120F 26 Ga 36 x 120 Galv. BEADED
GSB24G3696F 24 Ga 36 x 96 Galv. BEADED
GSB24G36120F 24 Ga 36 x 120 Galv. BEADED
GSB26G4896S 26 Ga 48 x 96 Galv. BEADED
GSB26G48120S 26 Ga 48 x 120 Galv. BEADED
GSB24G4896S 24 Ga 48 x 96 Galv. BEADED
GSB24G48120S 24 Ga 48 x 120 Galv. BEADED
GSB26G4896N 26 Ga 48 x 96 Galv. BEADED
GSB26G48120N 26 Ga 48 x 120 Galv. BEADED
GSB26G60120N 26 Ga 60 x 120 Galv. BEADED
GSB24G4896N 24 Ga 48 x 96 Galv. BEADED
GSB24G48120N 24 Ga 48 x 120 Galv. BEADED
GSB24G60120N 24 Ga 60 x 120 Galv. BEADED
GSB22G4896N 22 Ga 48 x 96 Galv. BEADED
GSB22G48120N 22 Ga 48 x 120 Galv. BEADED
GSB22G6096N 22 Ga 60 x 96 Galv. BEADED
GSB22G60120N 22 Ga 60 x 120 Galv. BEADED
GSB20G4896N 20 Ga 48 x 96 Galv. BEADED
GSB20G48120N 20 Ga 48 x 120 Galv. BEADED
GSB20G60120N 20 Ga 60 x 120 Galv. BEADED
GSB18G48120N 18 Ga 48 x 120 Galv. BEADED
GSB18G60120N 18 Ga 60 x 120 Galv. BEADED
GSB16G48120N 16 Ga 48 x 120 Galv. BEADED
GSB26G4896T 26 Ga 48 x 96 Galv. BEADED
GSB26G48120T 26 Ga 48 x 120 Galv. BEADED
GSB24G48120T 24 Ga 48 x 120 Galv. BEADED
