Abstract: There is provided a floor drainage assembly for inhibiting water from passing from an upper floor of a building to lower floors of the building. The floor drainage assembly includes a stairwell drain and a stairwell trough connected to the drain. The stairwell trough extends along the stairwell threshold. Water from the upper floor entering the stairwell threshold is at least partially captured by the stairwell trough and directed to the stairwell drain. The assembly inhibits the water from damaging lower floors thereby. An angled threshold plate that is isosceles trapezoid shaped in cross-section may extend across the stairwell drain. The floor drainage assembly may also include a hoistway drain and a hoistway trough extending along the hoistway threshold. Water from the upper floor entering the hoistway threshold is at least partially captured by the hoistway trough and directed to the hoistway drain.

Abstract: The present invention relates to a floor drainage assembly for inhibiting water from passing from one floor of a building to an other floor of the building. The one floor is disposed above the other floor. The one floor includes a stairwell threshold. The building has a stairwell connecting the one floor to the other floor. The one floor is in communication with the stairwell via the stairwell threshold. The floor drainage assembly includes a stairwell drain and a stairwell trough. The stairwell trough extends along the stairwell threshold. The stairwell trough is in fluid communication with the stairwell drain, whereby water from the one floor that enters the stairwell threshold is at least partially captured by the stairwell trough and directed to the stairwell drain. The assembly inhibits the water from damaging the other floor thereby.