L - Arden spiral duct supports provide a professional and secure method for installing round or flat oval spiral duct lines on roofs or other pathways. These supports are directly mounted to the top of an equipment rail, which comes in different styles depending on the application. Easy adjustment can be made to center the pipe or change its elevation. Multiple or single supports can be installed on each rail. Spiral supports are provided with separate saddle and glide strip to allow for movement due to expansion and contraction of the duct. The duct is housed on a wide radius flange support to distribute the load. A one-piece housing support incorporates two steel threaded rods for height adjustment and support. These rods can also be loosened to allow adjustment of the duct left or right. A wide band strap over the top secures the duct in place during wind conditions to prevent uplift.