| 摘要 |
The invention relates to the building industry and more particularly to a metal ribbed formwork (1) having a cross-section with polygonal ribs, which is further provided with local inset deformations (7) formed in the edges (2, 3) of the ribs, said deformations forming series of narrowings of the lands (4, 5) which are anchored in the concrete. The invention also relates to a machine for fabricating such sectional elements. The formwork according to the invention is intended to the construction of high span collaborating floors. |
