Apprentice answerCan HVAC duct be supported from acoustic ceiling grid wires
1st YearInspection, QA/QC, Finish & CloseoutStop and get direction
No. Ceiling grid wire is not duct support. Remove the tie and hang the duct independently from approved structure.
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Plain-English answer
Acoustic ceiling grid wire is for the ceiling system, not mechanical support. Tying duct to it can pull the grid out of level or bring ceiling tile down.
Remove the unapproved support, protect the ceiling grid, and install independent hanger wire/rod from approved structure per the project support detail.