Using our in-house resources, Cobb Mechanical manufactures round and rectangular duct products with state-of-the-art, high-speed equipment ensuring consistent quality on any job, large or small.

All of Cobb Mechanical’s in-house ductwork and fittings meet the SMACNA and ASHRAE specifications of 6-90/ASTM-653/A924, and our shop standards have been verified by the SMACNA Testing and Research Institute. In addition, out round-duct has been velocity tested by an independent party to ensure quality.

ROUND DUCT PRODUCTS
Our spiral pipe is formed from continuous coils of metal, using a 4-ply lockseam. This results in a very high strength to weight ration allowing for use on low, medium and high velocity air systems of either negative or positive pressure. Our standard spiral duct is available in even diameters from 4” to 80”, 26 to 16 gauge and lengths up to 20’.

Galvanized Steel
Aluminum #3003-HO-LFQ
Stainless Steel
Poly Vinyl Chloride (P.C.D.)
Paintlock
Double Wall Insulated (Acoustical and Thermal)
Non-welded elbows and reducers are available gorelocked in diameters from 9” to 50”
And up to 18 gauge.
All round fittings are fabricated exactly to specifications, spot-welded and sealed with diameters up to 80”.

RECTANGULAR DUCT PRODUCTS
Cobb Mechanical can fabricate virtually any rectangular duct product that you may need for commercial, industrial and institutional applications. Longitude seams are typically made Pittsburgh locks or button-punch snap locks. Transverse joints can be made with Engel’s integrated transverse duct SNAP flange system (TDF), or S & drive slip-joints.