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RE: Suspended Speaker

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Title: Suspended Speaker
I think the question I supposed to ask is, "Is it allowed not to seismically brace the speaker due to the reason I previously mentioned (seismic is not required for elements that are suspended and free to translate during a seismic event for more than the expected earth displacements)."
 
The speaker by the way will be installed in a high school gymnasium and auditorium.
 
Thanks again!
 
Alfonso S. Quilala Jr., P.E.
-----Original Message-----
From: Mark D. Anderson PE [mailto:mark(--nospam--at)alaskaengineer.com]
Sent: Wednesday, February 07, 2001 2:56 PM
To: seaint(--nospam--at)seaint.org
Subject: Re: Suspended Speaker

Are you looking for something beyond footnotes 11 and 12 to Table 16-O in the 1997 UBC?
 
Mark D. Anderson PE
----- Original Message -----
Sent: Wednesday, February 07, 2001 9:10 AM
Subject: Suspended Speaker

I am reviewing a submittal consist of 300 lbs. speaker cluster that is to be suspended using an aircraft cable.  It will be attached to the midpoint of a bottom chord of a truss.  The Structural Engineer noted in his calcs. that seismic is not required for elements that are suspended and free to translate during a seismic event for more than the expected earth displacements.  I think that I have read this note somewhere before but I can not recall where.  I tried to asked my co-worker and tried to look at the Code but I can not find it.  Will somebody point me where I can find it?


Thanks a lot in advance!

Alfonso S. Quilala Jr., P.E.