Reply to "Fire Resistant Assemblies"

This is in regards to a project (R-2, Type VB, fully sprinklered) designed under the 2010 CBC:  Section 712.3, Exception:  says that floor/ceiling assemblies between dwelling units are not less than ½ hour rated with sprinklers throughout.  

 

Also, Section 709.3 Exception 2: says that walls between dwelling units are not less than ½ hour with sprinklers throughout.  

 

Is there such a thing as 1/2 hour rated assemblies?

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