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RE: Town Home Lateral Loads

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I guess that's the second point of the debate. I would consider all units 
as a single building and drag the forces through so that there is 
deflection compatibility.

I'm not sure if that's what you are talking about Chuck, but it did remind 
me of the other method of analysis which is popular and that is to consider 
 each unit "stand alone" but then connect them together which I disagree 

T. William (Bill) Allen, S.E. (CA #2607)
University of Southern California, M.S.C.E., 1983
University of Texas at El Paso, B.S.C.E., 1977

Consulting Structural Engineers
32302 Camino Capistrano, #206
San Juan Capistrano, CA 92675
V (949) 248-8588•F (949) 209-2509

-----Original Message-----
From: seaint-seaosc(--nospam--at) [mailto:seaint-seaosc(--nospam--at)] On 
Behalf Of Chuck Utzman Sent: Thursday, July 04, 2013 1:26 PM
To: seaint-seaosc(--nospam--at)
Subject: Re: [SEAINT-SEAOSC] Town Home Lateral Loads

I beg to differ. Back when I did condo forensic work, I saw a lot of this 
construction. It wasn't a "code interpretation" & I would be amazed if you 
could talk the CBO into something else. With continuity in the roof & 
exterior sheathing, a little care in the LFRS design to establish stiffness 
 compatibilty, & the units will move in phase. Treat it like a single 
building. You are worrying about something that probably would never happen 
 during an event that is unlikely to happen in your lifetime. Chuck Utzman, 

On 7/4/2013 8:38 AM, T.William (Bill) Allen, S.E. wrote:
> Jeff - I realize that fires kill more people than earthquakes, but
> this is not a rational code interpretation by the building official. I
> suggest that a.) you do not separate the buildings and b.) suggest
> that the sheathing penetrating the area separation be fire treated.
> Otherwise, show him/her the section of the code regarding seismic
> separation which will probably require something like 6" between units
> (or more) which would kill the project. Most of the other building
> officials have interpreted it this way (allowing sheathing to run
> through). Unfortunately, it appears that the jurisdiction you are
> dealing with is not yet enlightened. Have fun with your project!

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