Layout & Coordination · Bottom elevation
Lay out bottom-of-duct elevation
Square Duct Installation — Rectangular main
Task typeBottom elevation
Tools / equipmentLaser, story pole, tape
How to install it
- 1
Confirm finished ceiling and structural elevation
- 2
calculate duct bottom from center/top reference
- 3
laser marks along route.
Quality check
- Elevation clears structure and ceiling
- consistent datum
Stop and verify
Stop if elevations conflict with other trades