Flat Oval Spiral Duct Observe the down below online video to see the set up of oval duct and fittings. Detect the reducer being used is undersized on its collar enabling the oval duct to slide above the collar. These are utilizing Unistrut with threaded rods as hangers for that https://collinlfuiw.blogunteer.com/35635812/5-simple-techniques-for-round-conduit