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Re: Collector element

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>From your description, and without the benefit of seeing the entire 
structural system and layout, it seems that there may not be enough overall 
shear resisting elements (walls, vertical frames, etc.) and the design(er) is 
trying to force the entire seismic force through one collector to a single 
such element. (?)  So, maybe that's the direction a solution should take - 
more load paths.  Otherwise, 780 kips seems an insurmountable force to be 
resisted w/ embedded re-bar.   Can the diaphragm itself actually deliver such 
a load to the collector (per Sec. 1633.2.6) ? HTH

Ephraim G. Hirsch, SE

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