1/2" drywall ceiling on 24" centerline joists

Posted by bitternut on April 27, 2007, 4:54 pm

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?

Posted by dvgolnik on April 27, 2007, 7:43 pm

use 1/2" cd board. it's ceiling board.
david

>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?
>

Posted by Robert Allison on April 27, 2007, 8:51 pm

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

Posted by on April 27, 2007, 9:28 pm

> 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

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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