Rectangular Duct & TDC/TDF · Straight Runs & Assembly
Straight rectangular TDC duct run
Horizontal straight run
ConnectionTDC/TDF gasketed flange with corners, bolts and cleats
SupportTrapeze, rod-and-strut, cable trapeze or approved support
Before you start
- Hangers are in and set to elevation before any duct comes off the cart.
- If yo...
- Stage the needed tools and materials before lifting the section: TDC corners (right count, right gauge), TDC cleats cut to length, gasket roll....
Tools and materials
TDC corners (right count, right gauge), TDC cleats cut to length, gasket roll...
Lay it out
- Snap the centerline on the deck or floor and transfer it up. Set the botto...
Set and support it
- Set and verify the approved supports before the connection is closed. Keep the joint from carrying the weight of the duct or fitting.
- Use the approved support method for this condition: Trapeze, rod-and-strut, cable trapeze or approved support.
Make the connection
- 1
Snap the centerline on the deck or floor and transfer it up. Set the botto...
Check the install
- No daylight through the joint anywhere along its length. Get under it and l...
Common mistakes
- Cleat driven from the wrong end. It walks and bows off the far corner and y...
Stop and ask
Stop for damaged flanges, wrong pressure class, unsupported weight or field r...