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cieling finish hung of k-joist bottom chords require additional bracing?

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Someone at work asked about the adequacy of k-joist bottom chords from the additional seismic loads imparted perpendicular to the bottom chords by installing a gypsum finish on hat channels on the bottom chords.

Does the code require a ceiling connected to k-joist bottom chords to be braced to the deck?  Should the bottom chords be checked for out-of-plane bending between bridging or something? 



Scott Haan.