| 摘要 |
A building front element having two opposite and mutually parallel guiding profiles (12, 14) is provided with two frames (22, 24) being displaceable in vertical direction. In addition, and in order to provide a static and dynamic balancing of the displaceable frames (22, 24), the building front element (10) is provided with two wires (34, 35) forming a cross-suspension of the two displaceable frames, said displaceable frames (22, 24) being of the same weight. Thus, one of said wires connects an upper corner at one side of one of the displaceable frames with an upper corner at the opposite side of the other displaceable frame. In the same manner, the second wire connects the other two upper corners of the two displaceable frames. |
