The leading manufacturer of rectangular fittings in many sizes and configurations, Sheet Metal Connectors, Inc. makes concentric transition duct fittings, which are also known as centerline transitions in our state-of-the-art fabrication facilities. All fittings are fabricated with stiffening beads on duct sizes 19” wide and larger which have more than 10 square feet of unbraced panel. Fittings shall be beaded unless the duct will have an insulation covering or an acoustical liner. This requirement is applicable to 20 gauge or less in thickness and 3” W.G. or less. Most concentric transition duct fittings are fabricated with Pittsburgh seams. Fittings are available completely assembled with all accessories (reinforcement, corners, etc…) installed. Fittings are also available knocked down to reduce shipping and handling costs.
Founded more than 50 years ago, we are proud to stand behind our made-in-the-USA products. If you would like to know more about concentric transitions, contact us and one of our team members will be happy to speak with you.