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Composite beams and columns

Composite steel-concrete construction involves linking the beam to the concrete slab mechanically, to optimise materials.

Furthermore, the reinforced concrete slab, which already acts as the horizontal loadbearing surface, is used as the compression component of the composite section. It thus increases both the resistance and the rigidity of the beam, which forms the tension element under bending.

Likewise, concrete and steel can be combined in composite columns of various sections.

In the case of multi-storey buildings, composite columns (sections covered with reinforced concrete) contribute not only to fire protection, but also to the transfer of vertical loads, thereby ensuring the stability of the structure and considerably reducing the crosssection and number of columns needed.

The hollow shape of H-sections means that they can be filled level with concrete between the flanges before the parts are assembled, thus eliminating formwork costs. This technique allows part of the metal surfaces to be left visible for architectural purposes.

Composite structures offer unrivalled properties when exposed to seismic loads.


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