Do not ignore a beam clamp that has already moved once.
Check
Mark the current clamp location and see if it keeps moving.
Check flange slope and set screw contact.
Check whether equipment vibration is transferring into the hanger.
Verify approved retaining strap/safety method.
Re-level the run after clamp correction.
Steps
Mark the current clamp location and see if it keeps moving.
Check flange slope and set screw contact.
Check whether equipment vibration is transferring into the hanger.
Verify approved retaining strap/safety method.
Re-level the run after clamp correction.
Say this to your foreman
The beam clamps at [location] are walking on the sloped flange when the fan runs. I checked vibration and flange angle. Do you want retainer straps or a revised attachment detail?