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Posted by G Henslee on August 2, 2005, 10:57 am
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.
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