Wrong rod or strap size is a support/load-path issue, not a cosmetic mistake. The right fix is usually to get the correct hardware, not to double up undersized material or hide it.
Ask before moving anchors, changing spacing, deleting supports, drilling structure, or altering trapeze/seismic layout.
Watch out
Do not double up undersized rod or strap to compensate unless an approved detail specifically allows it.
Check
Check the approved hanger detail, project spec, or company standard for the required rod or strap size for this duct.
If the wrong rod or strap is already installed, mark the locations and do not load them with duct weight until corrected.
Check whether the issue is rod diameter, strap width, strap gauge, anchor type, or all of the above.
Get the correct hardware before setting duct on undersized supports.
Do not substitute a different hanger method unless the approved detail allows it.
Steps
Check the approved hanger detail, project spec, or company standard for the required rod or strap size for this duct.
If the wrong rod or strap is already installed, mark the locations and do not load them with duct weight until corrected.
Check whether the issue is rod diameter, strap width, strap gauge, anchor type, or all of the above.
Get the correct hardware before setting duct on undersized supports.
Do not substitute a different hanger method unless the approved detail allows it.
Say this to your foreman
I have [size/type] rod or strap installed, but the detail/spec appears to require [size/type] for this run. Do you want these pulled and reset with the correct hardware, or is there an approved alternative?