Duct size reduced in field without approval
Field-reducing duct size is a design/approval issue. Stop and document before a “small change” becomes a system performance problem.
Watch out
- Do not reduce duct size to fit a clash without approval.
Check
- Compare installed/reduced size to latest drawing/shop drawing.
- Confirm if a transition/reduction was approved.
- Measure where the reduction starts and what it serves.
- Photo the condition and drawing callout.
- Ask before cutting, reducing, or accepting the changed size.
Steps
- Compare installed/reduced size to latest drawing/shop drawing.
- Confirm if a transition/reduction was approved.
- Measure where the reduction starts and what it serves.
- Photo the condition and drawing callout.
- Ask before cutting, reducing, or accepting the changed size.
Say this to your foreman
This duct was reduced from [size] to [size] in the field at [location]. Was this approved, or should we hold it for direction?
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