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Ask the reinforcing steel worker, and how much floats out of the balcony.
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Generally speaking, if nothing else, it will not collapse.
Basically, there is no problem, it was supported by a reverse beam before, but it is better to reinforce it, otherwise it will sink later.
If the balcony floats out, its reinforcement is based on daily use, so if you want to change it to a kitchen, it may crack and will not collapse instantly.
If it had appeared at that time, it was the heat generated by the solidification of the mortar! It's not normal to have a fever for a long time!
If it's 12 walls, there's no problem, the floor slabs are all bearable, generally speaking, just the property management won't let you do this.
It will not be too heavy, the balcony will bear about 300 kg square meters, and the floor will not exceed this amount.