Do not cut, loosen, or move seismic bracing to make your duct fit. Verify the brace, measure the conflict, and offset/reroute the duct only by an approved method.
Do not cut, notch, loosen, relocate, or hang from seismic bracing without approved direction.
Check
Identify whether the crossing item is seismic bracing, hanger support, pipe support, or temporary work.
Measure the clearance and exact crossing point.
Check whether your duct can offset, change elevation, or shift without hurting airflow/access.
Check for metal-on-metal contact, chafing, and future movement.
Ask before touching any seismic or structural brace.
Steps
Identify whether the crossing item is seismic bracing, hanger support, pipe support, or temporary work.
Measure the clearance and exact crossing point.
Check whether your duct can offset, change elevation, or shift without hurting airflow/access.
Check for metal-on-metal contact, chafing, and future movement.
Ask before touching any seismic or structural brace.
Say this to your foreman
A seismic brace crosses our round duct route at [location]. I measured the conflict and checked offset space. Do you want us to offset the duct, change elevation, or coordinate a revised brace/detail?