Static field route #15111

Duct is rattling or vibrating after startup. What should I check?

Airflow, Noise, Vibration & TAB Impactsyellow

Stay clear and treat it as a support/connection/isolation symptom. Check loose hangers, long unsupported spans, rubbing against structure, stretched flex connectors, loose joints, and equipment vibration transfer.

Open in Field Rescue Open category

Field checklist

Where vibration starts
Loose support or joint
Metal touching structure
Flex connector stretched/tight
Equipment isolation/fan connection

Ask foreman

After startup, this duct rattles/vibrates at [location]. I checked visible supports, joints, and flex connector. Do you want me to correct support, hold for TAB/startup, or inspect another point?

Do not

Do not grab vibrating duct, wedge scraps into hangers, or silence the noise without finding the cause.

Why it matters

Startup vibration can indicate loose support, bad fit-up, missing isolation, or airflow/equipment issues.

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