Device for dividing floor coverings at a door opening

Device for dividing coverings on a floor at a door opening, the coverings being laid on a sub-floor, said device comprising:

• a rail adapted to be sunk into the floor across the door opening, said rail having a substantially uniform H-shaped cross-section comprising a cross-member with first arms extending upwardly therefrom and second arms extending downwardly therefrom, said first arms and said cross-member defining a first groove and said second arms defining a second groove;
• a magnetic sealing strip received within said first groove and vertically moveable within said first groove;
• a set screw adapted to be mounted on the sub-floor and extending upwardly into said second groove;
• a polygonal nut engaged with said set screw, said nut being received within said second groove;
• and
• guide means provided within said second groove to guide and retain said nut and to adjustably support said rail on said nut.