| 摘要 |
The invention relates to a beam structure, generally comprising two flange sections and at least one web section fitted therebetween. The web section is made of diagonal steel wires or bars which are welded crosswise to each other to form a diagonal wire or bar mesh (86, 86b, 86c, 86e). The web forming wires or bars are positioned at least in three layers and oriented such that the wires or bars (86b) in the outer layers are substantially parallel to each other, and the wires or bars (86c) in the intermediate layer are crosswise to the wires or bars (86b) in the outer layers. |
