The DDK In-Slab Duct System is designed to exhaust air from bathroom fans, range hoods and clothes dryers, using a rectangular seamed duct which is encased in the concrete floors of high rise buildings.
The DDKduct in-slab duct system meets the following specifications:
- Made with high quality galvanized steel using a spiral wound lockseam
- 3 Hour F and FT rating tested in accordance with ULS S115-M95 and ASTM E814-02 test requirements
- Impact load testing in accordance with CAN 3 A23.1 M77, Falsework for Construction Purposes
- Airflow and cut friction chars provide in accordance with SMACNA and ASHRAE guide.
The DDK in-slab duct system consists of a full range of terminations, couplers and fittings.