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Re: 2007 CBC special seismic load combinations

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I would check with the building department and see what supplements
(if any) are applicable in that area. Even if there is one, it may not
be accepted yet in that area.

WH

On Tue, May 27, 2008 at 1:33 PM, Mark D. Baker <shake4bake(--nospam--at)verizon.net> wrote:
> Wait a minute.....is there a supplement to the CBC which deletes 1605.4
> also???
>
> Mark D. Baker
>
> -----Original Message-----
> From: William Haynes [mailto:gtg740p(--nospam--at)gmail.com]
> Sent: Tuesday, May 27, 2008 9:42 AM
> To: seaint(--nospam--at)seaint.org
> Subject: Re: 2007 CBC special seismic load combinations
>
> I have already come across this problem before and found that section
> 1605.4 has been removed by the 2007 supplement to IBC 2006.
>
> WH
>
> On Tue, May 27, 2008 at 12:09 PM, Yousefi, Ben
> <Ben.Yousefi(--nospam--at)mountainview.gov> wrote:
>> This is a good question. I am also kind of puzzled by the language in the
>> IBC/CBC requiring that both the LRFD and ASD design be based on the same
>> load combination! I personally hope this is an oversight and not a
>> deliberate attempt at superseding ASCE 7. Substantial time an effort was
> put
>> in creating section 12.4 of the ASCE in order to consolidate and simplify
>> the load combinations involving seismic loads. Equations 5, 6 and 8 along
>> with section 12.4.3.3 of the ASCE 7 make a lot more sense to me than the
> IBC
>> provision.
>>
>>
>>
>> Ben Yousefi, SE, CBO
>>
>> Chief Building Official
>>
>> City of Mountain View, CA
>>
>> (650) 526-7007
>>
>> ben.yousefi(--nospam--at)mountainview.gov
>>
>> ________________________________
>>
>> From: Mark D. Baker [mailto:shake4bake(--nospam--at)earthlink.net]
>> Sent: Saturday, May 24, 2008 11:12 AM
>> To: seaint(--nospam--at)seaint.org
>> Subject: 2007 cbc special seismic load combinations
>>
>>
>>
>> I've been away from the list for quite some time, I have looked through
> the
>> archives for messages on this topic and found none.
>>
>>
>>
>> Should we be using the CBC Equations 16-22 & 16-23 or ASCE 7-05  section
>> 12.4.3.2 Equations 6 & 8?
>>
>>
>>
>> I do not find any reference in the CBC which requires the use of the ASCE
>> equations. My confusion comes from the Seismic Design Manual Volume 2, Ex.
> 2
>> using the ASCE equations for the uplift of shear panel on a beam.
>>
>>
>>
>>
>>
>>
>>
>> Thanks,
>>
>>
>>
>> Mark D. Baker
>>
>> Baker Engineering
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
> --
>
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-- 
William

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