Tell someone or document it before you close it up.
Sprinkler pipe blocks duct route
A blocked duct route is a coordination problem, not permission to freestyle a reroute. Document what is blocking the path and confirm which system controls the space before moving anything.
My duct route at [grid/elevation] is blocked by [trade/system]. I cannot tell whether they were there first or whether this is a new conflict. I have a photo and the current drawing. Do you want a coordination call, or is there a preferred route direction?
Watch out
Do not offset, flatten, notch, or squeeze duct around sprinkler pipe without approval.
Check
Identify what is blocking the route: sprinkler pipe, conduit, cable tray, plumbing, structure, ceiling feature, equipment access, or another trade's support.
Note the grid, room, elevation, and direction of the conflict so the problem can be found again quickly.
Check whether the blocking item was shown before your duct route was laid out. If it was, the conflict may need engineering or coordination review.
Check whether the blocking item was installed after your duct route was established. If so, document it clearly before anyone moves work.
Do not reroute your duct without approval. A field detour can push your conflict into another trade's space downstream.
Steps
Identify what is blocking the route: sprinkler pipe, conduit, cable tray, plumbing, structure, ceiling feature, equipment access, or another trade's support.
Note the grid, room, elevation, and direction of the conflict so the problem can be found again quickly.
Check whether the blocking item was shown before your duct route was laid out. If it was, the conflict may need engineering or coordination review.
Check whether the blocking item was installed after your duct route was established. If so, document it clearly before anyone moves work.
Do not reroute your duct without approval. A field detour can push your conflict into another trade's space downstream.
Say this to your foreman
My duct route at [grid/elevation] is blocked by [trade/system]. I cannot tell whether they were there first or whether this is a new conflict. I have a photo and the current drawing. Do you want a coordination call, or is there a preferred route direction?