Laying out a duct transition using incorrect center-line math
2nd YearMeasuring & Layout
For transitions, establish the centerline of both the large and small end, find the offset, then divide the taper evenly across the length. Sketch it befo…
Safer field move
For transitions, establish the centerline of both the large and small end, find the offset, then divide the taper evenly across the length. Sketch it before scribing — errors here waste a full sheet.
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Can you verify this before I keep going? I’m looking at: Laying out a duct transition using incorrect center-line math. What’s the approved correction for this job?
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Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.