Spiral & Round Duct · Straight Runs & Assembly
Large-diameter spiral trunk
Large round main
ConnectionHeavy-duty coupling, draw band or flanged ring
SupportEngineered saddles, trapezes or cable system
Before you start
- Large spiral is heavy, awkward, and easy to damage.
- Confirm the lift, the sli...
- Stage the needed tools and materials before lifting the section: Lift, soft slings or a spreader, wide saddles or engineered trapeze hardware,....
Tools and materials
Lift, soft slings or a spreader, wide saddles or engineered trapeze hardware,...
Lay it out
- Set the wide saddles or engineered trapezes first, all of them, leveled to...
Set and support it
- Set the wide saddles or engineered trapezes first, all of them, leveled to...
- Use the approved support method for this condition: Engineered saddles, trapezes or cable system.
Make the connection
- 1
Set the wide saddles or engineered trapezes first, all of them, leveled to...
Check the install
- No flat spots anywhere, especially at the supports and slings.
- Coupling c...
Common mistakes
- Bare slings or chain on the pipe. Instant flat spot.
- Cranking the draw ba...
Stop and ask
Stop if duct is out of round beyond repair or support/load design is not conf...