TinnerFlow™3rd YearBeam Clamps / VibrationYELLOW · Check First
Vibration plus a sloped steel flange can walk a clamp out of position. Hold the line, add the approved retaining method, or revise the attachment.
A clamp that moves after startup is not a cosmetic issue. The duct line is telling you the support is not locked against vibration and slope.
Check the clamp type, set screw, flange angle, and equipment vibration. The recovery is usually a rated retainer strap, revised clamp, secondary safety, or a different anchor point approved for that condition.
Do not ignore a beam clamp that has already moved once.
A slipping clamp changes elevation, stresses joints, and can eventually lose support.
Final direction still comes from approved drawings, specs, manufacturer instructions, employer policy, foreman/detailer direction, structural/seismic details, and AHJ/code requirements.