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The rusting balcony deck edge needs repair. Smooth corrugated metal surface with no patterns or embossments, so it might be a non-composite deck. How bad is this for the structural integrity of the decking? How to repair it?
Hello @lixuekai2001
Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about your concrete deck.
In this particular instance, I suggest engaging the services of a structural engineer as this needs a professional eye to assess it correctly. It appears that the rust has eaten through some of the steel support and is no longer just surface rust. I'm sorry I can't provide you with a more positive assessment. But in the interest of health and safety its best to get a professional opinion.
If you need further assistance, please let us know.
Eric
