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Re: More Drift Talk

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Story drifts should not be added up. It is normally the maximum drift which is
of interest.
Mehdi Khabbazan
PhD, CEng

Joseph Ward wrote:

> We have had engineers tell us that stair systems must accommodate building
> drift at the magnitude of 4 inches (in one case) per floor each direction.
> The stair manufacturer then suffered the costly task of replacing
> connections.  Our concern is that when a building drifts 4 inches any
> direction, what happens to doors, windows, and all other components?  What
> happens when you add this up over several stories?