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Re: UCI-CoLA Research

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I was wondering about nails backing out from a combination of stress
relaxation on the nail (i.e. transverse bending of the wall) and concurrent
torsion of the wall.

-----Original Message-----
From: Silva John (sj) <Silva(--nospam--at)>
To: 'seaint(--nospam--at)' <seaint(--nospam--at)>
Date: Monday, October 04, 1999 10:45 AM
Subject: RE: UCI-CoLA Research

>Last I heard, all of the testing at Bob's lab has been with hand-driven
>common nails and plywood.  What about comparing the behavior of gun-driven
>nails and OSB?  This seems to be the preferred method today.  Also, some
>investigation to put the story to rest regarding 3-ply vs. 5-ply plywood,
>box vs. common nails, etc. would be welcome.
>John Silva
>Hilti, Inc.
>> ----------
>> From: Amie Smith[SMTP:asmith(--nospam--at)]
>> Reply To: seaint(--nospam--at)
>> Sent: Wednesday, September 08, 1999 3:30 PM
>> To: seaint(--nospam--at)
>> Subject: UCI-CoLA Research
>> This message is being sent to act as a recruitment devise for
>> suggestions
>> from the design profession on timber shear walls.  Since late '98 UC
>> Irvine
>> has been conducting a Light-framed Shearwall Research Project in
>> conjunction
>> with the City of LA.  This project has revolved around the construction,
>> pseudo-static testing and analyzing of 27 different wall configurations
>> with
>> variable sheathing type and thickness', nail type and spacing as well as
>> wood and steel stud framing.  To date the project has provided raw and
>> summarized data related to envelope load-displacement curves, estimates
>> of
>> the yield limit and strength limit states, drift information, etc.
>> Currently, myself and 2 other graduate students involved in running this
>> research project, will ultimately use this collected data for the basis
>> of
>> our MS thesis.  As we begin the brainstorming for specific thesis topics
>> we
>> are interested in the ideas and advise of the design professional's.
>> Are
>> there any topics that specifically interest you or any ongoing issues in
>> the
>> design community that a thesis paper could address?  If you would like
>> more
>> information on the project e-mail me at asmith(--nospam--at), otherwise we
>> look forward to hearing your responses/suggestions.
>> Thank You
>> Amie Smith
>> UCI Graduate Student