Flat Oval Spiral Duct Enjoy the beneath movie to begin to see the set up of oval duct and fittings. Discover the reducer getting used is undersized on its collar permitting the oval duct to slide around the collar. They may be working with Unistrut with threaded rods as hangers https://andresqgvjy.bloggactivo.com/35772237/oval-conduit-fundamentals-explained