| 摘要 |
<p>The element (1) has prestressed bars (6, 7) longitudinally extended in a hollow block (2) having a U shaped section. Each of the bars has ends equipped with a plate (16) and another plate that are applied on ends (18, 19) of the element, respectively. Each plate is equipped with a fixation unit constituted of a recess and a threaded insert that are fixed to corresponding ends of the bar and uniquely extended towards interior of the block.</p> |
