| 摘要 |
<p>Extended, layered construction element (1) comprising an upper structure (2) having an upper, external layer (3) and a lower structure (6) comprising a lower, external layer (7), said upper and lower structure (2 and 6 resp.) being rigidly attached to one another by spacing elements (10). Near the upper, external layer (3) and near the lower, external layer (7) through openings (12) ) for receiving pretensioning elements (18) are arranged with defined intervals across the length extension of the construction element. Inside at least one of upper, external layer and lower, external layer a plate (4, 8) is arranged to take up shear stress, said plate (4, 8) covering substantially the entire layer (3 resp. 7) and is directly or indirectly attached to said layer as well as to said spacing elements (10). The invention also concerns a floor/ ceiling construction and a roof construction assembled by a number of such construction elements.</p> |
