Layout & Coordination · Control line
Establish centerline
Square Duct Installation — Straight corridor run
Task typeControl line
Tools / equipmentLaser, chalk line, tape
How to install it
- 1
Transfer grid or wall reference
- 2
snap/laser a continuous line
- 3
mark offsets and fitting stations.
Quality check
- Line references actual building control
- no cumulative measuring
Stop and verify
Stop if wall/ceiling layout is not final