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Re: More questions about rigid plywood Diaphragms

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Thank you Einar - I look forward to reviewing this method. I may have 
misunderstood you. I have not read the entire FEMA273 although I have 
downloaded a copy. I am simply frustrated with the new code. 
I urge you to send me (privately) your calculations so that I might be able 
to follow your rationale. 

In a message dated 7/5/99 7:45:37 AM Pacific Daylight Time, byggtak(--nospam--at) 

<< Dennis, I was, I think, just refering to the the defination for flexible,
 stif and rigid diaprhagm and the formulas 8-2, 8-6 and 8-7 in FEMA273 and
 ASCEE/FEMA273 1 drawt Prestandard for a unglued blocked diaprhagm. I was
 just emphasising the defination for stif diaprhagm not being rigid, that is
 not being able to transfer rotation in it's plan. When I say, it is very
 likly that the diaphragms shall be calculated asuming flexible diaphragms, I
 meant calculated using the simplified flexible methode or the tribute area
 methode.  I maybe wrong but this assumption is based on my caculations. I
 was expecting you to comment on this subject earlier the FEMA273 and
 ASCEE/FEMA273 1 drawt Prestandard.
 I know things are complicated, openings, aspect ratios, elastic design,
 strenght design etc., but I think there is a need for simplified methodes in
 the Codes for the design of small houses because of small fees, specialy for
 wood houses. The computer calculations may all be fine, but the end results
 are never better than the assumptions and the data that we use in the
 calculations.  So I think there some room for simplifications.
 Dennis I will e-mail you privatly my calculations and an example of the
 danish methode for small houses for review and mayby something extra if your
 bandwith can take it ( just a joke ).
 My 10 cent's
 Einar Einarsson, CE.