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RE: Support framing for composite metal deck diaphragms

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For studs, the limit is in LRFD Specification Section I5.6. The diameter cannot exceed 2.5 times the flange thickness, unless the stud is over the web. However, the best way to apply this limit is to establish a minimum flange thickness for your selection of beam sizes in your composite projects (flange thickness greater than 0.4 times the stud diameter).


Charlie

 


From: Jake Watson [mailto:jwatson(--nospam--at)utahisp.com]
Sent: Thursday, July 22, 2004 8:38 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Support framing for composite metal deck diaphragms

 

AWS has guidelines.  It is based on the diameter of stud you chose.  You may also find guidelines in the composite chapter of the LRFD manual.  I think that's where I saw them first.  Sorry, I don't remember the ratio off the top of my head.

 

Jake Watson, P.E.
Salt Lake City, UT

-----Original Message-----
From: Paul Feather [mailto:pfeather(--nospam--at)SE-Solutions.net]
Sent: Wednesday, July 21, 2004 11:41 AM
To: SEAOC List
Subject: Support framing for composite metal deck diaphragms

Any feedback / experience regarding the minimum base metal thickness of the support system flanges for a welded composite metal deck application?  What is the practical minimum limit?