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Gyp. Board ceiling diaphragm

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Scott:
 
Merry Christmas.
 
The only time this has come up has been with the review by the State of California, OSHPD, for hospitals.  Drywall ceilings can be used for bracing non-bearing partitions only when the ceiling is the same height and continuous in the overall area (building or floor).  There were no design values used in the evaluation. 
 
With Joy and Hope,
Integrated Design Services, Inc.
 
Bob Freeman, Architect
Structural Designer
(949) 387-8500