| 摘要 |
Drain for surface water comprising a drain grating (2) arranged on a concrete drain (1), the flanges (7) of the grating (2) thereby resting on a layer of bitumen masses (3). To lift the upper surface of the grating (2) bitumen masses are refilled through apertures (5) in the flanges (7) and to lower the grating (2) bitumen masses (3) are pressed up through the apertures (5) in the flanges (7) of the grating (2) by heating the grating (2) and thereby also the bitumen masses. The invention also is concerned with a method for installation and subsequent lifting or lowering of the drain grating (2) in relation to the drain (1) to achieve alignment with the surrounding surfaces. |
