SHEILD ROCK Double Unistrut Channels (Back-to-Back) are the optimal engineered solution for applications that exceed the capacity of single channels. They are manufactured by joining two channels together back-to-back, doubling the moment of inertia and structural load capacity. These channels are available in large sizes including (42D, 62D, 82D, 124D, 164D) and thicknesses up to 3.0mm, with standard lengths of 3 or 6 meters. Specifically designed for major projects such as power plants, factories, and massive HVAC systems, they provide a solid and reliable fastening base for all types of supports and accessories.