How To Measure Rectangular Duct
Abbreviations
S/D – Slips & Drives Connection.
4S – 4 Slips Connection.
Raw – No Connection System.
1″FL Out – 1 Inch Flange Out.
1″FL In – 1 Inch Flange In.
DM – Duct Mate Connection.
TDC – 4 Corners Bolts Connection.
WMS – Wire Mesh Screen.
V/D – Volume Damper.
CL – Center Line
A/D – Access Door.
AL – Acoustical lining.
FO – Flat Oval.
Ø – Round.
BF – Bottom Flat.
BD – Bottom Down.
BU – Bottom Up.
TF – Top Flat.
TD – Top Down.
TU – Top Up