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Sheetrock screw pattern

e hilton

Bronze Member
Joined
Jul 2, 2014
Messages
3,132
Location
Virginia
I saw a youtube video about a 3 man crew hanging 4x20 ft gwb on the ceiling. I was a little surprised and the small number of screws they used, unless they went back and added more later. It did look like one guy was adding daubs of something on the framing just before the gwb was lifted. Commercial job, metal framing. Question ... if they were using adhesive does that change the screw pattern?
It was posted by maxkil if you want to see it.
 
Not into sheetrock but looks like they are putting quite a few in


Does it matter that it is metal studs ??
 
Back in the UBC days, you got a substantial reduction in fasteners required with adhesive.....not anymore.......

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Per some manuf's When Adhesive
Construction adhesive can be used on studs and joists in conjunction with (but not as a replacement for) drywall screws. Running a bead of adhesive on the stud or joist prior to screwing on the panel exponentially increases strength between the panels and members.

Generally, when using screws and glue, screws can be placed at twice the distance as with screws only. This is not recommended for do-it-yourselfers because, unless you are experienced with drywall, there is a high likelihood that you may need to readjust a board or even reinstall. Once glue is binding the panel to the joist or stud, it is impossible to remove without damaging the drywall, requiring total replacement.
 
The 2012 code, Table 2508.5. Foot note (c) allows for 1.25-inch #6 type S or W screws to be substituted for listed nails.

I see the TWO nails @ 12-inch centers sometimes on residential ceiling jobs but don't see that in the commercial footnotes?

Also they punched a hole for the electric wire but didn't pull it through, bunch of scalawags?
 
IBC does not get into the weeds about general fastening for gypsum but rather points towards all of the ASTM Standards. GA 216 still has reductions for adhesive.
 
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