Image: Sketch of composite beams with prefabricated slab - bauwion
In this slab system, complete prefabricated slab elements are combined with steel composite beams. On site, only the joint grouting between the individual precast elements and the grouting in the area of the composite girders on which the elements rest must be accomplished. Only through this grouting is the upper chord of the steel composite girder produced. In the meantime, head bolt dowels welded to the steel profile have become established as composite agents. It creates a secure and force-fit bond between the materials steel and reinforced concrete. In order to connect the precast slab to the composite girder, reinforcement loops protruding from the precast elements are placed over the head bolts of the composite girder and thus connected to them. Adjusting these loops in relation to the bolt position can prove difficult in practice.
The ceiling elements are lifted into their final position by crane and can be walked on immediately, assembly support is not necessary. Due to the high degree of prefabrication, there are short construction times.
The composite beams are individually manufactured in steel mills from standardised beam profiles. They are to be constructed and dimensioned in accordance with Eurocode 4. The prefabricated slab is regulated in Eurocode 2 and the associated standards of the respective prefabricated slab type.
Source: bauwion
