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Re: Wood Construction Holdowns at Corners

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PHD refers to 'predefelected holdown'. A relatively new design where
predeflection design is manufactured
into the device to help minimize deflection from material elongation.

Steven A.
Los Angeles


Gary Hodgson & Associates wrote:

> Joe,
> I wonder if you can tell us what is a PHD holddown.
> Gary Hodgson
>
> On 30 May 2003 at 13:19, Jnapd(--nospam--at)aol.com wrote:
>
> > Chris:
> >
> > It may seem silly to apply loads from two directions to the post until
> > you see actual damage first hand as in Northrdge Earthquake.  The most
> > common post failure was at corner post. The usually pulled through the
> > wood at the holdown connection.  If the bolt holes were oversized the
> > damage was more severe.  That is one reason our company uses PHD
> > holdowns when possible.
> >
> > Joe Venuti
> > Johnson & Nielsen Associates
> > Palm Springs,  CA
> >
> >
>
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