Static field route #527

What do I do when missing a note that says duct is internally lined?

Print Reading, Tags & LayoutFoundation print-reading starter — verify latest revision/detail

If a note says duct is internally lined, treat it like a size, clearance, and material issue before install.

Open in Field Rescue Open category

Field checklist

Find liner note/schedule.
Confirm lined duct location and length.
Check inside clear area and fitting impact.
Protect liner from damage.
Ask before cutting, sealing, or connecting lined duct.

Ask foreman

Where does the internal liner start/stop, and how should this connection be handled?

Do not

Do not install lined duct like bare duct without checking size/clearance and liner protection.

Why it matters

Liner changes airflow area, sound/thermal performance, and how the duct can be worked.

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