Rectangular Duct & TDC/TDF · Straight Runs & Assembly
Double-wall rectangular duct
Insulated/acoustical duct
ConnectionDual inner/outer joint system
SupportWide trapeze with load spread
Before you start
- Double-wall means there are two joints, and one of them you will never reach ...
- Stage the needed tools and materials before lifting the section: Inner air barrier joint hardware, outer shell joint hardware, insulation fill....
Tools and materials
Inner air barrier joint hardware, outer shell joint hardware, insulation fill...
Lay it out
- Set the wide trapezes and confirm they spread the load across the outer sh...
Set and support it
- Set the wide trapezes and confirm they spread the load across the outer sh...
- Use the approved support method for this condition: Wide trapeze with load spread.
Make the connection
- 1
Set the wide trapezes and confirm they spread the load across the outer sh...
Check the install
- Inner liner continuous and sealed, confirmed by eye before closure.
- Insul...
Common mistakes
- Closing the outer shell over an unsealed inner joint. Nobody finds it until...
Stop and ask
Stop if inner joint is inaccessible, insulation is missing or outer shell hid...