[Build] Box of 4" long square-drive screws

[jim]

go to the front room near the bigger sub-panel 
and look at the pipe that's going through the 
floor, you can see a hole next to the pipe and 
maybe you or someone can estimate what's the 
deal. i didn't think of doing that, sorry to 
say. my recollection is that the floor planks 
sit directly on the joists below, no ceiling 
underneath, i think we can see the second floor 
floor. 



On Sat, 2009-08-15 at 21:35 -0700, John Magolske wrote:
> * jim <jim at well.com> [090815 20:37]:
> >   four inches seems too long to me. two-by-fours are 3.5 inches by
> > 1.625 inches. the floor is likely one inch or less. four inch screws
> > through the sole plates into the floor will likely be exposed under
> > the floor to whatever's below, possibly no ceiling on the undersides
> > of the floor joists and a possible hazard to persons working on the
> > second floor ceiling (e.g. lights, other things fastened there).
> >   we'll likely use 1/2 inch sheetrock, and a four inch screw will
> > be hard work overkill to fasten the rock to the wall studs (1 1/4 or
> > 1 1/2 inch lengths are usually used).
> 
> I agree they'd be wrong for putting up sheet-rock, standard drywall
> screws would be much more appropriate. A use-case I was thinking of
> was attaching the sole plates of the walls to the floor joists below:
> 
>     screw - (2x4 + Flooring) = 4 - (1.625 + 1) = 1.375"
> 
> So around 1-3/8" of bite into the floor joist...too much? But are we
> going to even bother with finding floor joists to attach to? Is it ok
> to just attach walls to the hardwood flooring? Is there a layer of
> sub-flooring between the exposed hardwood flooring & the floor joists?
> 
> Maybe they'd be useful for 'toe-nailing' across corners, or...well,
> I'll just bring in a lunch bag of the screws & if they end up being
> useful for anything I can bring in more.
> 
> dpc -- yes, they are flat-head (82 deg. I believe), and pretty heavy
> duty. Don't recall the size offhand, I think #10's or #12's
> 
> 
> - John (who's wrapping up a buildout in his kitchen and will
>         be joining in the fun at the 2169M buildout soon...)
> 
>