Static field route #1045

Mechanical drawing and shop drawing show different duct size

Print Reading, Tags & LayoutV136 field-polished

Hold the install until the controlling document is confirmed. Approved shop drawings, RFIs, sketches, or addenda may control, but the field should not decide alone.

Open in Field Rescue Open category

Field checklist

Compare revision dates and approval/status stamps.
Check piece marks and system/area tag.
Photo both callouts side by side.
Ask foreman/PM which document controls.
Do not install more of that run until direction is clear.

Ask foreman

The mechanical drawing shows [size], but the shop drawing shows [size] for the same run. Which one controls?

Do not

Do not choose the drawing that matches the material just because the material is already staged.

Why it matters

This route was added from apprentice scenario testing to catch natural field/search language before it becomes a dead end. Verify job-specific authority before acting.

Search words: shop drawing different from mechanical plan which drawing controls size conflict shop drawing different from mechanical plan which drawing controls size conflict