| 摘要 |
An improved coupling element for inverted T beams characterised by comprising at their ends an appendix ( 2 ) formed from two portions ( 8, 10 ) of different height, the outer portion ( 10 ) having the lesser height and being bent to V-shape with the free part ( 14 ) comprising a tooth ( 16 ), and in their central web ( 4 ) at least one aperture ( 18 ) having a height substantially corresponding to the height of the outer portion ( 10 ), for the insertion of said portion and its stable retention by the tooth and by the edge of the inner portion ( 8 ). |
