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Posted by Robert Allison on April 28, 2007, 1:39 am
AAllc.architects@gmail.com wrote:
>
>>bitternut wrote:
>>
>>>I am replacing a ceiling in a room that will be more or less 6' x 12'. The
>>>ceiling joists are 11-7/8 I joists running perpendicular to the 12' axis on
>>>24" centers. The rest of the house is over 40 years old and has 1/2" drywall
>>>running perpendicular to trusses that are on 24" centers. I always thought
>>>you should use 5/8" on a ceiling when joists were on 24" centers.
>>
>>>I will be replacing more ceiling in the future so should I continue with the
>>>1/2" on 24" centers, use 5/8" on 24" centers, or install strapping on 16"
>>>centers and use 1/2"? What would the pro's do in this situation?
>>
>>We run 5/8". It is code around here. And we have to do that
>>even on 16" centers. Has to do with the fire rating.
>>
>>--
>>Robert Allison
>>Rimshot, Inc.
>>Georgetown, TX
>
>
> Is that Type 'X'?
> T
>
Type X is fire rated, but all 5/8" drywall is basically fire
resistant due to the nature of gypsum. If you want higher
fire resistance, then type X is used and if you need a higher
rating, then type C.
--
Robert Allison
Rimshot, Inc.
Georgetown, TX
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