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RE: Structural stability of fire walls

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Thank you for your reply – I’ll take a look into the archives.  I guess the “simple” answer is that the wall has to be positively anchored for its full load on both sides, but does the positive anchoring on one side need to pull away, too?  That doesn’t make sense.  Maybe that’s the Nylatron system that Matt was talking about (forgive me, Matt, as I haven’t looked it up yet).







From: Daryl Richardson [mailto:h.d.richardson(--nospam--at)]
Sent: Tuesday, February 16, 2010 1:29 PM
To: seaint(--nospam--at)
Subject: Re: Structural stability of fire walls




        This was discussed in some detail in April and May of 2006 under the heading "Firewalls and Seismic Code" and Firewall "Design Philosophy" as well as one or two other headings.  You might start by reviewing those postings (+- 20 postings).


        At that time I suggested that some of us on the list should consider co-operatively publishing a discussion paper.  I also provided a list of sub topics which could be included as a start to the discussion.  That, unfortunately, was not only the start but also the end of the discussion.


        I still feel that this is an area where there is insufficient guidance for design engineers and that some work is required.  I would still make myself available to help develop a discussion paper or even a full fledged design guide if someone wants to take charge of it and act as co-ordinator.




H. Daryl Richardson

----- Original Message -----

From: Dave Adams

Sent: Tuesday, February 16, 2010 10:27 AM

Subject: Structural stability of fire walls


Hello all,


Someone has probably brought this up before, but perhaps not.  How are you all handling the sections of the code which require fire walls to remain standing if the building portion on either side collapses from a fire (Section 705.2, for example)?  I have seen a detail that shows an essentially complete gravity load resisting wall system on each side, thus creating a three-walled fire wall system.  This seems like overkill.




Dave K. Adams, S.E.

Lane Engineers, Inc.

Tulare, CA