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RE: Concrete dobies

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And are the cans those piddly little North American
sizes or are they the generous European cans? :-)
Gary


On 26 Apr 2006 at 17:22, Harold Sprague wrote:

> Dave,
> I have seen many methods and attempts of providing the clearance for the 
> bottom steel reinforcing in foundations.  Dobies are by far and away the 
> best method for providing that clearance.  They are not block outs. Anything 
> you provide for maintaining clearance can provide a path for moisture 
> migration.  Dobies are the most apt to be placed correctly and less subject 
> to problems of potential workmanship errors.
> 
> This is more from field observations than official studies or behind the 
> desk research.  It may be anecdotal in nature, but it is good anecdotal 
> research.
> 
> Dobies are decidedly better than empty beer cans and a lot less tragic than 
> full beer cans.
> 
> How many of us know how often block outs for hand rail posts are provided by 
> aluminum cans about 45.3% of the time? (OK I made up the percent number;>)
> 
> Regards,
> Harold Sprague
> 
> 
> >From: "Dave Adams" <davea(--nospam--at)laneengineers.com>
> >Reply-To: <seaint(--nospam--at)seaint.org>
> >To: <seaint(--nospam--at)seaint.org>
> >Subject: Concrete dobies
> >Date: Wed, 26 Apr 2006 09:32:56 -0700
> >
> >Hello list,
> >
> >Is anyone aware of reports or testing of concrete foundation members
> >where reinforcing has been raised above the soil by dobies?  It's done
> >all the time and I've never really given it much thought, but it sure
> >seems like they provide a nice little path for moisture to infiltrate
> >and corrode the reinforcing steel since they seem to essentially become
> >"block-outs" in the member.
> >
> >Any thoughts?  W.A.G.'s?
> >
> >Dave K. Adams, S.E.
> >Lane Engineers, Inc.
> >Tulare, CA
> >E-mail:  davea(--nospam--at)laneengineers.com
> 
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