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I need to install a floor safe in a concrete slab that has tension cables running through it. What method(s) are there to find where they are. I assume there exists a metal detector suitable for the job? Anyone have a experience finding buried treasures? I am not worried about the plumbing because I will cut a new hole if any plumbing is found.
The house was built by a national builder. Would not trust any blue print data for location.