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Posted by on January 21, 2008, 12:11 pm
Hello there, I am putting in a drywalled ceiling in my basement. I
had to use 5/8" drywall as fire-blocking between the stud wall and
foundation, but planned on using 1/2" drywall for the actual main
ceiling since my joists are close enough together to allow that.
However, I read on this forum that 5/8" rock might be required for
fire protection for the main ceiling, by code. Since I am doing this
with the proper inspections, can anyone shed light on this? Is it in
the national building codes, or is this a one-off requirement of some
jurisdictions? Thanks.
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Posted by Mikey S. on January 21, 2008, 12:18 pm
Since your doing it the right way, with inspections, just call and ask your
inspector before you do the job, It will take 5 minutes and it's the only
safe and foolproof way to avoid a BIG problem later on when the inspector
shows up.
What's in the code is important, but not nearly as important as what the
inspector thinks is in the code :-)
--
Mikey S.
> Hello there, I am putting in a drywalled ceiling in my basement. I
> had to use 5/8" drywall as fire-blocking between the stud wall and
> foundation, but planned on using 1/2" drywall for the actual main
> ceiling since my joists are close enough together to allow that.
> However, I read on this forum that 5/8" rock might be required for
> fire protection for the main ceiling, by code. Since I am doing this
> with the proper inspections, can anyone shed light on this? Is it in
> the national building codes, or is this a one-off requirement of some
> jurisdictions? Thanks.
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Posted by Oren on January 21, 2008, 3:39 pm
>Since your doing it the right way, with inspections, just call and ask your
>inspector before you do the job, It will take 5 minutes and it's the only
>safe and foolproof way to avoid a BIG problem later on when the inspector
>shows up.
>What's in the code is important, but not nearly as important as what the
>inspector thinks is in the code :-)
I don't believe the inspector would argue about 5/8 inch rock on the
ceiling.
Oren
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Posted by on January 21, 2008, 4:25 pm
Online copy of the NJ Building Code states that "Gypsum board shall be
permitted to be used on wood joists to create a horizontal diaphragm
ceiling in accordance with table 2508.5" which then states that 1/2"
Gypsum board used on framing members of 16" o.c. provides 90 plf shear
value, and on 24" o.c. provides 70 plf shear value when used with 1
5/8" wall borad nails or 1 1/4" type S or W screws.
The fire-resistance rated section of the code is simply too confusing
to understand, but they wouldn't have conflicting requirements in the
code book, would they?
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Posted by Oren on January 21, 2008, 5:21 pm
On Mon, 21 Jan 2008 13:25:12 -0800 (PST), joemcinter19@gmail.com
wrote:
>Online copy of the NJ Building Code states that "Gypsum board shall be
>permitted to be used on wood joists to create a horizontal diaphragm
>ceiling in accordance with table 2508.5" which then states that 1/2"
>Gypsum board used on framing members of 16" o.c. provides 90 plf shear
>value, and on 24" o.c. provides 70 plf shear value when used with 1
>5/8" wall borad nails or 1 1/4" type S or W screws.
>
>The fire-resistance rated section of the code is simply too confusing
>to understand, but they wouldn't have conflicting requirements in the
>code book, would they?
Stop by, and see the local fire house Captain! Ask him/her.
Oren
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