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<DIV><SPAN class=816413413-03092004>Smita,</SPAN></DIV>
<DIV><SPAN class=816413413-03092004></SPAN> </DIV>
<DIV><SPAN class=816413413-03092004>You might try checking the CA building codes
authorities for their requirements on seismic bracing. I think this link
gets you to their home page: <A
href="http://www.bsc.ca.gov/index.html">http://www.bsc.ca.gov/index.html</A></SPAN></DIV>
<DIV><SPAN class=816413413-03092004></SPAN> </DIV>
<DIV><SPAN class=816413413-03092004>It might take some nosing around to find the
correct area, but it's a possible place to start. </SPAN></DIV>
<DIV><SPAN class=816413413-03092004></SPAN> </DIV>
<DIV><SPAN class=816413413-03092004>Happy hunting.</SPAN></DIV>
<DIV><SPAN class=816413413-03092004></SPAN> </DIV>
<DIV><SPAN class=816413413-03092004>Mike Busman, C.E.M.</SPAN></DIV>
<DIV><SPAN class=816413413-03092004>Senior Project Engineer</SPAN></DIV>
<DIV><SPAN class=816413413-03092004>NORESCO, LLC</SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT
face=Tahoma>-----Original Message-----<BR><B>From:</B> Smita Gupta
[mailto:Sgupta@energy.state.ca.us]<BR><B>Sent:</B> Wednesday, September 01,
2004 4:39 PM<BR><B>To:</B> BLDG-SIM@gard.com<BR><B>Subject:</B> [BLDG-SIM]
metal bracing in wood construction<BR><BR></FONT></DIV>
<DIV>Thanks for all these detailed references, they are indeed valuable.
</DIV>
<DIV> </DIV>
<DIV>But what I need is the actual use data and not the effect of using
metal bracing. I need the actual amount of steel being used by the contractors
in California thru the various seismic zones. So its more a matter of a survey
database rather then the actual physics. </DIV>
<DIV> </DIV>
<DIV>I guess I need to ask this question in a contractors or a structural
engineers forum...</DIV>
<DIV> </DIV>
<DIV>-Smita</DIV>
<DIV> </DIV>
<DIV><BR><BR>>>> "Ian Doebber" <idoebber@vt.edu> 09/01/04
03:58PM >>><BR>Several scientists at Oak Ridge National Lab worked
with Enermodal to create<BR>ASHRAE Technical Committee 4.7 "Energy
Calculations" Report 1145 entitled<BR>"Modeling 2 and 3 Dimensional Heat
Transfer through Composite Wall and Roof<BR>Assemblies in Hourly Energy
Simulation Programs". It essentially covers the<BR>"Equivalent Wall
Method" to analyze the steady state performance (R-value)<BR>and transient
performance of a wall system and accurately model it in say<BR>DOE2.1 or
Energy Plus which are limited by their one dimensional conduction<BR>analysis
for the building envelope. If you are just interested in how
the<BR>metal bracing decreases the R-value, I would recommend "Thermal
Breaking<BR>Systems for Metal Stud Walls - Can Metal Stud Walls Perform as
Well as Wood<BR>Stud Walls" by some of the same researchers who worked with
Energy Model on<BR>the 1145 report mentioned above (Jan Kosny Jeffrey
Christian Andre<BR>Desjarlais) This report covers the effect of using
metal studs mainly in<BR>residential applications but concepts can be applied
to other applications<BR>as well. Both these publications use a Finite
Difference program called<BR>"Heating" which is very simple but robust to
conduct heat transfer<BR>calculations for pretty intricate wall
assemblies. It does both steady<BR>state and transient analyses.
Hope this helps<BR><BR>Ian Doebber<BR>Virginia Tech<BR>Graduate
Student<BR><BR>----- Original Message ----- <BR>From: "Leo Rainer"
<lirainer@davisenergy.com><BR>To: <BLDG-SIM@gard.com><BR>Sent:
Tuesday, August 31, 2004 2:20 PM<BR>Subject: [BLDG-SIM] metal bracing in wood
construction<BR><BR><BR>> Smita,<BR>><BR>> I suggest you take a look
at the report that Enermodal did on residential<BR>> framing factors. The
PIER funded part of the study is at:<BR>> <A
href="http://www.energy.ca.gov/pier/buildings/projects/400-00-002-0.html">http://www.energy.ca.gov/pier/buildings/projects/400-00-002-0.html</A><BR>><BR>>
This is part of a national level study they did for ASHRAE. There
should<BR>be<BR>> some data in there on the effect of various types of
bracing.<BR>><BR>>
Regards,<BR>><BR>>
Leo Rainer<BR>>
Senior Engineer<BR>><BR>> At 03:20 PM 8/30/04, Smita Gupta
wrote:<BR>> >Hi,<BR>> ><BR>> >I was looking for some
information regarding the amount of metal bracing<BR>> >being used in
wood stud wall construction for seismic reasons in<BR>> >California.
Wanted to estimate the change in U-values becoz of the<BR>> >addition of
steel to the wood construction and its impact on the energy<BR>>
>performance. Would appreciate any references to source of such
data,<BR>> >........and in the lack of, any anecdotal evidence of how
much steel does<BR>> >typically get added to shear walls.<BR>>
><BR>> >Thanks a lot,<BR>> ><BR>> >Smita Gupta<BR>>
>Energy Analyst, LEED AP<BR>> ><BR>> >Buildings &
Appliances Office<BR>> >California Energy Commission<BR>> >1516
Ninth St. MS 42<BR>> >Sacramento, CA 95814<BR>> >Phone: (916)
657-4034<BR>><BR>><BR>>
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