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Re: 97 UBC 1633.2.4 Deformation compatibilty - is that a typo?

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Thanks, Mike

I see what you are saying.  DeltaM will control in most cases.  If you ARE
at the drift limit for a relatively stiff building (deltaM = 0.025), then
the deltaM will control since it is much larger.

Mark

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Michael Valley wrote:

Mark: That is NOT a typo. Instead, this sets a lower bound on the demand
displacement. In other words, no matter how stiff you think your lateral
force resisting system is, you must consider an interstory drift of 0.25%
for deformation compatibility. -Mike