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Posted by G Henslee on August 2, 2005, 11:00 am
G Henslee wrote:
> xrongor wrote:
>
>>
>>> xrongor wrote:
>>>
>>>> hey all
>>>>
>>>> im hanging 4' x 8' x 5/8" firex type drywall on my garage ceiling
>>>> and plan
>>>> to pump in 8-10" (max) of loose insulation on top of it.
>>>>
>>>> rafters are 24" apart. am i good with 12" screw spacing to hold
>>>> this up?
>>>> for a 4x8 sheet this basically puts 5 screws across the width, every
>>>> 2'. or
>>>> 25 screws for a whole board.
>>>>
>>>> everything ive read seems to point to 12" spacing, and ive been told it
>>>> meets code. i just want to make sure before i pump the stuff in and
>>>> watch
>>>> my ceiling fall due to the weight.
>>>
>>>
>>> USG calls for 12" OC screws as maximum spacing. Don't be pennywise.
>>> Go with 8" OC. It'll cost you an extra fifteen minutes of your time
>>> and a few bucks for the screws.
>>
>>
>>
>> but why is there such a discrepancy? my local inspector told me that
>> 12" centers is good enough for up to 12" of blown in insulation on top
>> of the 5/8 firex. code normally has some fudge factor built into
>> it... if code says x is enough, why does everyone seem to suggest
>> using x+1?
>>
>> have you seen an actual failure when someone used 12" spacing?
>>
>> i mean you don run 10 gauge wire when 12 will do, just to stop from
>> being pennywise... you dont make fishing poles out or rebar either...
>>
>> randy
>>
>
> In the time you've spent pissn' and moin' you could have had it done. Go
> 8" if you're concerned and quit fretting over it for krist's sake.
PS. -end of subject-
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