Floor outlet column preparation. Outlet for use on the floor, intended for custom-made two-sided floor column or also for separate use. With holding frame and fastening material, two-part. cover and sealing foam to protect against dust. and wet cleaning of the floor. Cover serves as a waterproof blind cover when no floor column is installed. When installing a column, the removed part of the cover remains in the. outlet where it is secured by a retaining strap. Material: zinc.