Rectangular Duct & TDC/TDF · Straight Runs & Assembly
Large rectangular TDC duct
Large cross-section trunk
ConnectionReinforced TDC/TDF flange
SupportEngineered trapeze/support spacing based on size and gauge
Before you start
- This is a lift piece and a rigging conversation, not a two-man carry.
- Confirm...
- Stage the needed tools and materials before lifting the section: Lift and soft slings or a spreader bar, heavier trapeze hardware per the deta....
Tools and materials
Lift and soft slings or a spreader bar, heavier trapeze hardware per the deta...
Lay it out
- Set the heavier trapezes first, all of them, and level them across the run...
Set and support it
- Set the heavier trapezes first, all of them, and level them across the run...
- Use the approved support method for this condition: Engineered trapeze/support spacing based on size and gauge.
Make the connection
- 1
Set the heavier trapezes first, all of them, and level them across the run...
Check the install
- No oil-canning beyond what the spec allows, checked under load with the lif...
Common mistakes
- Skipping the temporary spreader because 'it looked fine on the ground.' Big...
Stop and ask
Stop if reinforcement, gauge, joint type or lifting plan does not match appro...