Rubbing Bars for Fun and Profit

Kent McMillan · 2010-08-10T03:40:20Z

I've mentioned this subject before elsewhere on a message board far, far away in cyberspace, but there may be a few readers who will still find the subject interesting, namely, how to describe the differences between steel rebars driven into the ground for boundary markers without pulling each and every last one out of the ground, cleaning it up for photography, and carefully resetting it in the same position as found. This particular survey was made in connection with a lawsuit that was in progress, so the method really needed to be one that it could not be plausibly claimed could have shifted the position of the marker by mistake.Part of the problem was determining what the common characteristics of the rebar markers were that could be shown to have been in place at some early date prior to development. It wasn't a stretch to think that other bars of the same pattern and apparent age were also attributable to the same surveyor.As it turned out, taking rubbings of the pattern of deformations on the bars was fairly easy and effective as documentation. The technique consisted of just cutting some small slips of bond paper, wrapping them partly around the bar and rubbing with a graphite stick to darken the protruding ribs and deformations.Here are some examples of similar groups of rebars that were found in place in that subdivision:

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Strictly Surveying

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Moe Shetty

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the secret of alginate....

the molds sound like hella lot of trouble. why not macro photos. maybe some keel on the deformations of the bar first, sort of highlight the pattern

Posted : August 11, 2010 4:53 am

Dane Mince

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the secret of alginate....

Nope no one is using it. It was just a suggestion, with other potential applications in mind. A photo, or a rubbing are plenty for the type of use, that you put them to currently.

Posted : August 11, 2010 6:21 pm

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Rubbing Bars for Fun and Profit

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