Bill, David, Drew, Jim, et al,
Thanks for your input on cold-formed steel shear values and appropriate R-values. My investigation leads me to believe that I should not count on anything from this pre-fab structure, so I'm looking at other options. There are several.
Jim, I looked online for the MCA primer, which I would be interested in regardless of whether I learn anything that might help on this job or not. My experience with corrugated decks thus far has always been using them filled with structural concrete. I assume the primer also provides guidance for using bare decks for shear. They want $100 for it...do you think it's worth it?
thanks,
Gordon
From: Jim Wilson [mailto:wilsonengineers@yahoo.com]
Sent: Tuesday, March 17, 2009 3:25 PM
To: seaint@seaint.org
Subject: Re: Cold-formed corrugated
Gordon,
You can find design theories and exact detailed examples on how to do this if you can get your hands on a copy of "A Primer on Diaphragm Design" from the Metal Construction Association. Its a bit tricky the first time through but it really works out nicely. If I recall correctly, it can also be made into spreadsheet form without too much work.
Jim Wilson, PE
Stroudsburg, PA
From: Gordon Goodell <GordonGoodell@harmonydesigninc.com>
To: seaint@seaint.org
Sent: Tuesday, March 17, 2009 2:47:15 PM
Subject: Cold-formed corrugated
I have a client who wants to use an "unengineered agricultural building" made of cold-formed steel as most of the envelope for a large woodshop. I have my roof diaphragm problems solved, because it's being furred out & covered w/ plywood (underside). Does anyone have experience using corrugated metal for shearwalls? It seems like the 4 ½", 20ga corrugated partition panels supplied with the kit should have a lot of shear resistance if connected properly. If I could prove it, it would be a shame to require wood shearwalls to be built right beside them.
thanks,
Gordon Goodell