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RE: FW: R-values in Seismic Provisions

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>If the non-structural elements had
>a higher mass to stiffness ratio than the structural elements,
Not to beat this completely bloody, but their individual stiffness 
doesn't matter as much as their ability to contribute to the overall 
energy of deformation. To the extent that they just ride along with the 
rest of the structure without being a part of the overall load path, 
non-structural elements just add mass. 

Christopher Wright P.E.    |"They couldn't hit an elephant from
chrisw(--nospam--at)skypoint.com        | this distance"   (last words of Gen.
___________________________| John Sedgwick, Spotsylvania 1864)
http://www.skypoint.com/~chrisw