There are metal detectors specifically tweaked for detecting rebar and post-tension cables in concrete. The cheapest I'm aware of is the Zircon MT-6 @ ~$125. It's good to 5-6" depth. I assume there are more expensive models that look deeper into the concrete.
You certainly don't want to go near a post-tension cable as cutting such a cable could seriously reduce the structural integrity of the building. Thanks, Brough Turner Mobile: +1 617 285-0433 Skype: brough Website <http://broughturner.com/> | Google+<https://plus.google.com/102447512447094746687/posts?hl=en> | Twitter <https://twitter.com/#!/brough> | LinkedIn<http://www.linkedin.com/in/broughturner> | Facebook <http://www.facebook.com/brough.turner> | Blog<http://blogs.broughturner.com/> | netBlazr Inc. <http://www.netblazr.com/> On Fri, Dec 9, 2011 at 10:33 AM, Stephen Ronan <[email protected]> wrote: > > I gather a metal detector wouldn't help due to rebar? If you just needed > > to detect live power lines, there are tools that can help with that. > > > > Is the building so old that a review of the blueprints would be > > impossible or insufficient? > > I'm wildly guessing the building dates to around the 1970's. For > reasons I don't understand the GPR person was very dismissive of > the possibility that a review of the blueprints would adequately > address the problem. From what I read, "post-tension cables" > seems like a significant potential issue; I don't have a sense of > whether there'd be another way to determine their location. > > Stephen Ronan > _______________________________________________ > Hardwarehacking mailing list > [email protected] > http://lists.blu.org/mailman/listinfo/hardwarehacking >
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