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RE: Crack monitoring

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That's worth three stars for creativity, cost and
advertising!
Thanks.
Jim

--- Nels Roselund <njineer(--nospam--at)att.net> wrote:
> Jim,
> 
> I use two of my business cards, one partially
> overlapping the other; one
> adhered to one side of the crack, and the other
> adhered to the other side.
> I then carefully mark two straight perpendicular
> lines onto the cards with a
> fine-point pencil, both lines extending onto both
> cards, and date the lines.
> A displacement across the crack will show up as an
> offset in one or both
> lines, indicating the amount of displacement and the
> direction.  For
> exterior surfaces, I use plastic cards.  If there is
> displacement, new lines
> may be marked and dated periodically.  I also mark
> and date the ends of
> cracks.
> 
> I've had folks, new owners, call me after finding my
> cards still on the wall
> years after I placed them. 
> 
> Nels Roselund, SE
> South San Gabriel, CA
> njineer(--nospam--at)att.net
> 
> -----Original Message-----
> From: Jim Wilson [mailto:wilsonengineers(--nospam--at)yahoo.com] 
> Sent: Wednesday, March 16, 2005 6:47 AM
> To: seaint(--nospam--at)seaint.org
> Subject: Crack monitoring
> 
> Where can stick-on concrete crack monitoring gizmos
> be
> purchased?
> 
> Jim Wilson, PE
> Stroudsburg, PA
> 
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