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Re: Rigid vs Flexible Diaphragms - Some Comm

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In a message dated 5/9/99 11:33:24 AM Pacific Daylight Time, 
rlema(--nospam--at) writes:

<< I think the tie between the rigid/flexible diaphragm and the story drift 
is that, if you think of the diaphragm as a deep beam supported on lateral 
shearwalls, the deflection at midspan compared to the story drift (that is, 
how much the supports move) is a good parameter to see if the diaphragm is 
rigid or not.  Just a thought.
 Rodrigo Lema. >>

You are correct, this is the thought behind plywood diaphgram rigidity 
arguments. The arguments include the quality of construction, the affects of 
every component upon the overall system - especially where discontinuities 
If you go back over some of the posts, many of these variables were discussed.