Flat Oval Spiral Duct Enjoy the beneath movie to begin to see the installation of oval duct and fittings. Observe which the reducer being used is undersized on its collar making it possible for the oval duct to slide over the collar. They can be applying Unistrut with threaded rods https://eduardoduiwk.blogmazing.com/35645015/indicators-on-oval-conduit-you-should-know