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Apprentice answer

How do I handle duct that arrives from the shop fabricated backwards

3rd YearMeasuring, Layout & Field MathCheck first

Do not try to force-hang it or smash it into place using a hammer. Bring it down flat to the floor layout deck. Check your original field sketch order sheet to see if the shop misread the notes or if your layout measurements were input upside down.

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Plain-English answer

Do not try to force-hang it or smash it into place using a hammer. Bring it down flat to the floor layout deck. Check your original field sketch order sheet to see if the shop misread the notes or if your layout measurements were input upside down.

If it's a simple symmetrical offset fitting, look to see if you can rotate the piece 180 ∘ to match the correct alignment path before calling the shop for a rush remanufacture.

Field checklist

Ask Foreman

Hey boss, I’m checking field math & measuring: How do I handle duct that arrives from the shop fabricated backwards? I found the likely issue and want to verify the next step before I lock it in. Do you want me to adjust it now or check the drawing/detail first?

Verify before acting

Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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