L/Arden duct support rails provide a professional and secure method for installing rectangular 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 adjustments can be made to level the duct or change elevations. Multiple or single supports can be installed on each rail. The support channel incorporates two steel 5/8” thread rods for height alteration and support. These rods can also be loosened to make adjustment of the duct left or right.