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Re: Alterations Chapter 34 2007 CBC[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: jeffsmith7(--nospam--at)comcast.net, seaint(--nospam--at)seaint.org
- Subject: Re: Alterations Chapter 34 2007 CBC
- From: Rhkratzse(--nospam--at)aol.com
- Date: Thu, 15 May 2008 13:25:06 EDT
There seems to be no recognition of the possibility that the element being "weakened" might have had, say, 20% greater capacity than required for the original design.
In a message dated 5/15/08 10:18:42 AM, jeffsmith7(--nospam--at)comcast.net writes:
I am interpreting section 3403.2.3.2 to require that an entire building
needs to be seismically upgraded if any seismically resisting element has
its strength reduced by more than 10%. In the case of a concrete shearwall
flexible diaphragm building, if you punch a whole in an exterior shear wall
and reduce the strength by 10% you have to upgrade the whole building, not
just the altered shear wall or do the exceptions 1-4 allow just the altered
wall to be strengthend?
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