Measure elevation from AFF or control line | TinnerFlow

Reference

Definition

What the word means. This is not a work instruction.

Measure elevation from AFF or control line

Equipment Connections: RTU, AHU, VAV, Fans & Louvers 1st Year REF

Watch out

Do not mix centerline and bottom-of-duct elevations.

Steps

Find the elevation note.
Confirm what BOD/TOD/CL means.
Measure from correct reference.
Check ceiling and other trades.
Ask before hanging.

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