Duct size installed smaller than print
Stop before covering or continuing. Wrong-size duct can change airflow, connections, insulation clearance, and inspection results.
Watch out
- Do not keep hanging the wrong size duct because the pieces are already staged.
Check
- Read the duct size exactly from the latest print/shop drawing.
- Measure the installed/staged duct width × height.
- Check whether the size changes at a transition or branch.
- Mark the location and take a photo of duct next to drawing callout.
- Ask before installing more or trying to “make it work.”
Steps
- Read the duct size exactly from the latest print/shop drawing.
- Measure the installed/staged duct width × height.
- Check whether the size changes at a transition or branch.
- Mark the location and take a photo of duct next to drawing callout.
- Ask before installing more or trying to “make it work.”
Say this to your foreman
The print shows [size], but this installed/staged duct is [size] at [location]. Do you want this held before we continue?
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