Unistrut Service Company's concrete base duct supports offer non-penetrating designs with rubber pads to prevent roof leaks. These systems are pre-engineered to comply with wind loading building code requirements. The systems are made with 12 gauge pre-galvanized or hot-dipped galvanized channels. Each system offers adjustable heights and custom designs are also welcome. These are available for online purchase now. Click below to read through the full brochure for different sizing and ordering options.