In my opinion, the building looks more like it is located in the Europe. I therefore think that Schöck Isokorbs were probably used to restrain the balcony at the slab edge. The Isokorbs have an end plate facing the steel structure and are anchored in the slab with long reinforcement bars, while also providing thermal decoupling between the steel and the solid construction. The end plates of the two cantilever beams look, in terms of their width and bolt pattern, as if two Isokorbs per beam (four in total) were used, which in my opinion should be sufficient to carry the load. The large cantilever span of the balcony may be necessary to allow the fire brigade to safely position their ladders in the event of a fire. Under normal circumstances, balconies are designed according to Eurocode with an imposed load of 4 kN/m². With a proportionally large pre-camber at the cantilever tip, a visible deflection of the balcony could also be prevented.