Static field route #112

What do I do when mixing TDC and Ductmate parts incorrectly?

Rectangular Duct Assembly: TDC / Ductmate / FlangesPolished core starter — connector/detail check

Do not treat TDC and Ductmate parts as interchangeable just because they look similar. Confirm the connector family, gasket, corners, clamps/cleats, and approved detail before mixing or substituting.

Open in Field Rescue Open category

Field checklist

Identify which connector system the duct actually has.
Compare the shop drawing/spec/submittal requirement.
Check corner pieces, gasket type, clamps/cleats/bolts, and pressure class.
Photograph the mismatch if the shipped duct does not match the spec.
Ask before substituting or sending material back.

Ask foreman

The spec says ____ but the duct arrived with ____. Are these approved as equivalent on this job, or do we need direction before installing?

Do not

Do not mix TDC/Ductmate parts because they look close enough.

Why it matters

Similar-looking flange systems can have different hardware, gasket details, manufacturer requirements, and approval status.

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