Not allowing for connector length in run measurement

If you measured the run but forgot to account for the connector, the duct section can end up too long or too short. The recovery depends on the connector type and how far off the piece is.

Stop if

• What connector/takeoff length should I allow for this run?

Watch out

• Do not force an oversized section into place by springing the connector
• it can damage the flange, hem, or joint alignment.

Check

• Identify the connector type: S-and-drive, TDC, Ductmate, round coupler, or another job-specific connection.
• Measure the piece you cut and compare it to the field space after accounting for the connector depth or overlap required by the job standard.
• If the piece is too long, re-cut only after you confirm which end can lose length without ruining the connector.
• If the piece is too short, use the short-cut recovery route and decide whether it needs a sleeve, filler, splice, adapter, or remake.
• Do not force a wrong-length section into place by springing the connectors.

Steps

• Identify the connector type: S-and-drive, TDC, Ductmate, round coupler, or another job-specific connection.
• Measure the piece you cut and compare it to the field space after accounting for the connector depth or overlap required by the job standard.
• If the piece is too long, re-cut only after you confirm which end can lose length without ruining the connector.
• If the piece is too short, use the short-cut recovery route and decide whether it needs a sleeve, filler, splice, adapter, or remake.
• Do not force a wrong-length section into place by springing the connectors.

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