How to Install Metal Ductwork

Industrial ductwork must be built to last. Instead of using thin aluminum ducts, commonly found in residential buildings, industrial buildings use steel ducts that are hung and secured with steel cables. This installation method ensures a sturdy, dependable duct system that is less likely to puncture and kink and that is positioned high enough away from employees to prevent danger should a puncture occur.

Graph paper
Pencil
Temporary hangers
adjustment sleeves
Clevis pin clamp
Permanent hangers

Instructions

- 1
  Draw out the plan for exactly where the venting will travel and the venting system's connection points to machinery and release vent points. Use a tally system to mark the amount of adjustment and connection pipes required for the outline.
- 2
  Install temporary hangers for holding the ductwork in place during the rough installation. These hangers should should be easily adjustable, such as a lasso hanger.
- 3
  Piece together as much of the metal duct as possible on the ground, as you'll have more torque and greater access to your tools. This is especially useful for straight runs.
- 4
  Place adjustment sleeves when you are in doubt of the exact fit for a connection. The adjustment sleeve can be fed into and out of the pipe as needed and then clamped with a clevis pin clamp once the duct piece is connected.
- 5
  Secure the final hung duct with permanent hangers and remove the temporary hangers as you work down the system. Do not install any permanent hangers until the job is complete, as permanent hangers do not have the same give as temporary hangers.

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