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

[dpc]

John Magolske <listmail at b79.net> writes:

> * 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. 
>
> 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?

i don't think the original walls were attached to joists. they worked on
the assumption of 'more than enough' connectors :-)

> 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

ok. that's pretty big, but it looks like they have a 'shoulder' near the
head that's not threaded. i missed it on the sizing page, but this
reduces the 'effective' length of the screw (it is like we drilled guide
holes in the first piece). i forget the reduction but an approximationis
doing the effective computation across the threaded length.

> 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.

i think they'd work great for the toenail but may be slightly less
effective for the attachment to the floor (not enough threads in the
floor itself).

\p

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