macsparran Posted February 11, 2018 Share Posted February 11, 2018 I'm revising the foundation in a plan, and suddenly have a new mark I wasn't expecting, and can't explain: an "S" with a line drawn to a point in the foundation wall. So far, I haven't found an explanation for this mark. Can anyone point me to an explanation? Link to comment Share on other sites More sharing options...
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