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.
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
CL - Center Line
Round & Flat Oval Duct
Learn How To Measure
For a better Communication we’ve created an explanation page of how to draw in 2D your exact pieces you need, looking on this page will reduce communication mistakes and enrich your measurements skills.