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Re: Plywood rigid diaphragms

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At 10:04 AM 8/28/98 -0700, you wrote:
>1994 code section 1628.5 does not state that plywood diaphragms are rigid.
>only states the deflection criteria of a diaphragm for it qualifying as a
>flexible diaphragm.
>It is possible for a plywood diaphragm to be considered rigid, but it
>is not categorically to be considered rigid in most conditions.

The code states that diaphragms may only be considered flexible when the
the diaphragm deflection is more than two times the story drift. For most
two story light framed structures the diaphragm deflection does not exceed
this number. 

Again this is the opinions of the presenters.