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RE: EQ resistant Design

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>Unfortunately the same reasons that you would state for doing a
>non-orthogonal design also affect orthogonal designs.  Just because the
>building can take the loadings at 40 or 45 degrees does not prove that the
>building can take the loads at other angles or even orthogonally.
Good point. I think the real basis of all this is that it's important the
there's only one seismic load, not 2 orthogonal loads. It's convenient to
resolve that seismic load into vector components, but we can't ignore the
actual direction of the load.

Same for wind--wind only comes from one direction at a time, but the
direction could be any which way, just like an earthquake.

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

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