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RE: Re-bar Congestion

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Here's my 2 cents:

Assuming the wall is more than a couple feet long, these anomalies are
not too frequent or too close together, and the resultant smaller
spacings do not violate minimum spacing requirements, I wouldn't be too
worried about it.

Tony Powers

> -----Original Message-----
> From:	Mike Brown [SMTP:mike.brown(--nospam--at)cshqa.com]
> Sent:	Thursday, August 13, 1998 8:53 AM
> To:	seaoc
> Subject:	Re-bar Congestion
> 
> Hello everyone.
>  
> I have a re-bar congestion problem where the bars are interfering with
> the form ties.  The situation is a 14 inch thick wall with (2) #11
> bars vertically at 5" o.c.  There are 4 walls that form a "box column"
> in plan view.  This box column not only resists some vertical loads,
> but is also the lateral resisting system for the eight story building.
>  
> The conflict is between the form ties and the bars.  The contractor is
> not able to locate the form ties so that there will not be a conflict
> with the bars.  The problem has to do with the splices.  Due to the
> tight spacing of bars and the fact that the dowels from the foundation
> were a little off, but within tolerance, there is a conflict at every
> pour height.  
>  
> We are now at the sixth floor.  Up until this point the bars were
> shifted as required but stayed within the specified tolerance. 
> However, we have come to a point where a couple of the bars need to be
> spaced about 8 inches in place of the specified 5 inches.  The total
> number of bars does remain the same and therefore the average spacing
> of bars is still 5 inches.  My question is that if this occurs only in
> some localized area, what compromises will the wall suffer?  Will the
> system as whole be compromised?  Will there only be additional cracks
> in the wall at this location?
>  
> Any help and opinions would be appreciated.
>  
> Thank you.
>  
> Mike Brown, P.E.
>