fixing to flange of RSJ / self tappers

[sm_jamieson]

I need to fix some timber onto the under side of an RSJ (non-
structural), i.e. into the flange. I don't have or wish to use a hilti
nail gun ! What is the best way to fix the timber ?
I want to drill holes as small as possible - also the flange is
tapered and not suited to bolts. I believe there are some tough self-
tappers that can do the job.
Anyone know what these are called ?
Cheers,
Simon.

[Dave Baker]

"sm_jamieson" <sm_ja...@hotmail.com> wrote in message
news:620acdde-33d6-4471...@33g2000vbe.googlegroups.com...

Tek screws.

http://www.tool-net.co.uk/s-1355/fasteners/tek-screws-self-drilling/buildex-teks-screws-general-components-to-steel.html

Personally I'd drill and tap and use ordinary bolts but then I've got all
that sort of stuff in the workshop. Make sure you get the right screw for
the steel thickness. You'll have to plough through the variants listed
above.
--
Dave Baker

[Dave]

sm_jamieson wrote:
> I need to fix some timber onto the under side of an RSJ (non-
> structural), i.e. into the flange. I don't have or wish to use a hilti
> nail gun ! What is the best way to fix the timber ?
> I want to drill holes as small as possible - also the flange is
> tapered and not suited to bolts.

There are washers for just this sort of application, They are simply
called tapered washers and are D shaped where the straight edge of the D
is the thinnest side and the round side gets thicker to the middle. You
fit them when there is a taper so that the thin side points to the web
of the RSJ.

> I believe there are some tough self-
> tappers that can do the job.
> Anyone know what these are called ?

I'll be interested in them as well.

Dave

[Dave]

Dave Baker wrote:
> "sm_jamieson" <sm_ja...@hotmail.com> wrote in message
> news:620acdde-33d6-4471...@33g2000vbe.googlegroups.com...
>> I need to fix some timber onto the under side of an RSJ (non-
>> structural), i.e. into the flange. I don't have or wish to use a hilti
>> nail gun ! What is the best way to fix the timber ?
>> I want to drill holes as small as possible - also the flange is
>> tapered and not suited to bolts. I believe there are some tough self-
>> tappers that can do the job.
>> Anyone know what these are called ?
>> Cheers,
>> Simon.
>
> Tek screws.
>
> http://www.tool-net.co.uk/s-1355/fasteners/tek-screws-self-drilling/buildex-teks-screws-general-components-to-steel.html

Not a bad price :-)

Dave

[1501]

Have you though about some of the more advanced constructional
adhesives available nowadays?

[fred]

In article <dYednfEl4NmIuyTX...@bt.com>, Dave
<dave...@btopenworld.com> writes

>sm_jamieson wrote:
>> I need to fix some timber onto the under side of an RSJ (non-
>> structural), i.e. into the flange. I don't have or wish to use a hilti
>> nail gun ! What is the best way to fix the timber ?
>> I want to drill holes as small as possible - also the flange is
>> tapered and not suited to bolts.
>
>There are washers for just this sort of application, They are simply
>called tapered washers and are D shaped where the straight edge of the D
>is the thinnest side and the round side gets thicker to the middle. You
>fit them when there is a taper so that the thin side points to the web
>of the RSJ.
>

That's a nice idea, I agree that through fixing is the way to go, thread
forming in something that thick and tough is a complete ball ache.

My suggestion was going to be drilling a clearance hole and screwing
into a batten on the inside of the web, no need to taper it, just screw
into it slant.
--
fred
BBC3, ITV2/3/4, channels going to the DOGs

[Simon]

On 22 Sep, 21:58, fred <n...@for.mail> wrote:
> In article <dYednfEl4NmIuyTXnZ2dnUVZ8gWdn...@bt.com>, Dave

Good point. I actually have timber bolted into the web anyway !
I can just drill a clearance hole through the RSJ and screw through.
With some of the thin screws around (e.g. drywall screws), 3-4mm would
be enough.
Dunno why I didn't think of that before :-)
Simon.

[The Natural Philosopher]

I would not bother. WE just whacked some shaped timber in with a large
mallet, and a bit of foam round it. And used that to mount the cladding off.

[fred]

In article
<b96e38b0-b79f-4fee...@m11g2000vbl.googlegroups.com>,
Simon <sm_ja...@hotmail.com> writes

>
>Good point. I actually have timber bolted into the web anyway !
>I can just drill a clearance hole through the RSJ and screw through.
>With some of the thin screws around (e.g. drywall screws), 3-4mm would
>be enough.
>Dunno why I didn't think of that before :-)

Can I interest Sir in some wheels I reinvented earlier this morning :-?

[Grimly Curmudgeon]

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "Dave Baker" <Nu...@null.com> saying
something like:

>Tek screws.
>
>http://www.tool-net.co.uk/s-1355/fasteners/tek-screws-self-drilling/buildex-teks-screws-general-components-to-steel.html

Ping! as the Tek screws shear off. Really, into the web of an RSJ?

[Simon]

On 25 Sep, 06:59, Grimly Curmudgeon <grimly4REM...@REMOVEgmail.com>
wrote:

> We were somewhere around Barstow, on the edge of the desert, when the

> drugs began to take hold. I remember "Dave Baker" <N...@null.com> saying
> something like:
>
> >Tek screws.
>
> >http://www.tool-net.co.uk/s-1355/fasteners/tek-screws-self-drilling/b...

>
> Ping! as the Tek screws shear off. Really, into the web of an RSJ?

I guess if a tapping tool can cut a thread a screw could ?
I was told this is possible but I'd like to see it. Mind you I find it
hard to
believe the hilti guns can nail to an RSJ !

In the end I drilled clearance holes and screwed into timber the other
side
of the flange.

Cheers,
Simon.

[Tim Lamb]

In message <uumob5li8s76eaccr...@4ax.com>, Grimly
Curmudgeon <grimly...@REMOVEgmail.com> writes

You might get away with it by counter boring the fixing holes such that
there is only one threads worth left. Tricky to do up in the air:-)

I would forget the self drilling attribute.

regards

--
Tim Lamb