First move
Stop and confirm exactly what is being cut and who approved it.
Check before moving
- Latest print/shop drawing/revision
- System and duct size
- What the cut changes
- Nearby utilities, sprinkler, structure, roof, rated wall, or equipment
- Measurement photo and wide photo
- Foreman/journeyman direction
Photo ID to collect
- Wide shot of route/conflict
- Close shot of cut location
- Tape measure photo
- Print/detail photo
Ask this
“This only fits if I cut it. Can you confirm before I modify it?”
Do not
Do not cut just because it almost fits.