RE: Seismic compression struts

You are correct.  CISCA references the splay wire and compression strut in "Guidelines for Direct Hung Ceiling Assemblies in Seismic Zones 3 & 4".  There were some studies a while back that indicated that the lateral drift was too great to reduce damage if splay wires were used without compression struts. 

Regards, Harold Sprague


 

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Subject: RE: Seismic compression struts
Date: Tue, 18 Aug 2009 11:58:05 -0400
From: mmotchos@sw-sc.com
To: seaint@seaint.org

I believe the compression posts come from ASCE's reference to "CISCA for Zones 3 & 4" for installations in D-F buildings. I don't have a copy of that to verify current requirements.

 

Michelle

 

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From: xmy978@gmail.com [mailto:xmy978@gmail.com]
Sent: Tuesday, August 18, 2009 11:34 AM
To: seaint@seaint.org
Subject: Seismic compression struts

Does the CBC 2007 (IBC2006) still require seismic compression struts for suspended ceilings? I cannot find it in the code?

 

Thanks

 

Bill

 

 

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