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James Hanley
 
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Default Screwing a screw into a fixing/plug (wrong size?)

I bought some equipment it came with screws. It needs screwing into
the wall. So I bought some plugs/fixings from homebase. The end of
the screw doesn't seem to reach the end of the plug/fixing, and it
splits at the bottom.
Here is a picture
http://www.acedial.co.uk/~marf/screw.jpg

THe fixing box says says No 5,8,10,12 3.5mm to 5.5mm wood screw

IT says that the screw must penetrate 25mm into the fixing. Fine, the
screw is 25mm long. But the picture on the fixing box shows it
reaching tho the end of the fixing - the fixing is 30mm long and also,
the picture on the box shows it fitting snugly without splitting the
fixing.

Is this the right size fixing for the screw?
And do I just drill a hole and if the hole's too small find a slightly
bigger drill bit. The box says it needs a 6mm masonry drill. But i've
done it before using drill bits and getting bigger until it fits. I
don't know what size my drill bits are but I know that at least one is
an ok size.
http://www.acedial.co.uk/~marf/thebox.jpg
  #2   Report Post  
Colin Wilson
 
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I bought some equipment it came with screws. It needs screwing into
the wall. So I bought some plugs/fixings from homebase. The end of
the screw doesn't seem to reach the end of the plug/fixing, and it
splits at the bottom.


What sort of surface are you trying to fix it to ?

(I spot no brick / plaster dust, so i`m curious)

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  #3   Report Post  
Andrew Barnes
 
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Are you sure that plug has been in a wall? If it was inside a drilled hole,
it wouldn't split like that i dont think.


  #4   Report Post  
a
 
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Default

I bought some equipment it came with screws. It needs screwing into
the wall. So I bought some plugs/fixings from homebase. The end of
the screw doesn't seem to reach the end of the plug/fixing, and it
splits at the bottom.
Here is a picture
http://www.acedial.co.uk/~marf/screw.jpg

THe fixing box says says No 5,8,10,12 3.5mm to 5.5mm wood screw

IT says that the screw must penetrate 25mm into the fixing. Fine, the
screw is 25mm long. But the picture on the fixing box shows it
reaching tho the end of the fixing - the fixing is 30mm long and also,
the picture on the box shows it fitting snugly without splitting the
fixing.

Is this the right size fixing for the screw?
And do I just drill a hole and if the hole's too small find a slightly
bigger drill bit. The box says it needs a 6mm masonry drill. But i've
done it before using drill bits and getting bigger until it fits. I
don't know what size my drill bits are but I know that at least one is
an ok size.
http://www.acedial.co.uk/~marf/thebox.jpg


I must admit I am always a little bit confused with plugs and whether I have
got ones big enough! The plug should be a snug fit in the hole - I like them
quite tight and tapping them home lightly with a hammer is better than them
being loose.

That picture looks like the screw has gone in at an angle?



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Andy Pandy
 
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Default

On 26 Oct 2004 10:54:24 -0700, (James
Hanley) wrote:

I bought some equipment it came with screws. It needs screwing into
the wall. So I bought some plugs/fixings from homebase. The end of
the screw doesn't seem to reach the end of the plug/fixing, and it
splits at the bottom.
Here is a picture
http://www.acedial.co.uk/~marf/screw.jpg


You sre putting the Plug into the wall "before inserting the screw?"

Kidding!

1 The plug may be sub standard and brittle !

2 In my experience any screws that I get already included with
equipment that i buy are strange sizes and weak so i use some that i
have pre bought in a pack at a earlier time.

Try a slightly thinner screw ! I think it would still do the job and
yet give the plug less strain !.

Good Luck

Andy


  #6   Report Post  
Peter Andrews
 
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Default


"James Hanley" wrote in message
m...
I bought some equipment it came with screws. It needs screwing into
the wall. So I bought some plugs/fixings from homebase. The end of
the screw doesn't seem to reach the end of the plug/fixing, and it
splits at the bottom.
Here is a picture
http://www.acedial.co.uk/~marf/screw.jpg

THe fixing box says says No 5,8,10,12 3.5mm to 5.5mm wood screw

IT says that the screw must penetrate 25mm into the fixing. Fine, the
screw is 25mm long. But the picture on the fixing box shows it
reaching tho the end of the fixing - the fixing is 30mm long and also,
the picture on the box shows it fitting snugly without splitting the
fixing.

Is this the right size fixing for the screw?
And do I just drill a hole and if the hole's too small find a slightly
bigger drill bit. The box says it needs a 6mm masonry drill. But i've
done it before using drill bits and getting bigger until it fits. I
don't know what size my drill bits are but I know that at least one is
an ok size.
http://www.acedial.co.uk/~marf/thebox.jpg


The plugs you have are suitable for a solid wall, e.g. brick, block, etc.
They are not suitable if it's a plasterboard wall. If it is brick then
drill a 6mm hole at least as deep as the plug is long, insert plug until
it's flush with the wall and then insert the screw. This should be OK for a
No. 6 or 8 screw, however if you are using a No.10 screw you may need to
make the hole 6.5mm diameter. I don't think that whatever you are fixing
can be heavy as the manufacturer would have supplied longer screws than
25mm.

Peter


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a
 
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"Andrew Barnes" wrote in message
...

Are you sure that plug has been in a wall? If it was inside a drilled

hole,
it wouldn't split like that i dont think.


perhaps it is a plasterboard wall?


  #8   Report Post  
James Hanley
 
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"Peter Andrews" wrote in message o.uk...
"James Hanley" wrote in message
m...
I bought some equipment it came with screws. It needs screwing into
the wall. So I bought some plugs/fixings from homebase. The end of
the screw doesn't seem to reach the end of the plug/fixing, and it
splits at the bottom.
Here is a picture
http://www.acedial.co.uk/~marf/screw.jpg

THe fixing box says says No 5,8,10,12 3.5mm to 5.5mm wood screw

IT says that the screw must penetrate 25mm into the fixing. Fine, the
screw is 25mm long. But the picture on the fixing box shows it
reaching tho the end of the fixing - the fixing is 30mm long and also,
the picture on the box shows it fitting snugly without splitting the
fixing.

Is this the right size fixing for the screw?
And do I just drill a hole and if the hole's too small find a slightly
bigger drill bit. The box says it needs a 6mm masonry drill. But i've
done it before using drill bits and getting bigger until it fits. I
don't know what size my drill bits are but I know that at least one is
an ok size.
http://www.acedial.co.uk/~marf/thebox.jpg


The plugs you have are suitable for a solid wall, e.g. brick, block, etc.
They are not suitable if it's a plasterboard wall. If it is brick then
drill a 6mm hole at least as deep as the plug is long, insert plug until
it's flush with the wall and then insert the screw. This should be OK for a
No. 6 or 8 screw, however if you are using a No.10 screw you may need to
make the hole 6.5mm diameter. I don't think that whatever you are fixing
can be heavy as the manufacturer would have supplied longer screws than
25mm.

Peter


either the picture on the box of plugs is wrong. Or the plug and screw
aren't matching - perhaps a bad plug. Which is it?

It might be that the wall is plaster, and behind that, brick.

If I can screw in easily, it would have to be plaster, right?

If it is plaster, what plugs do I get? Do I get plugs?

What I am fixing will be carrying up to 15 stone = 210lb = 94kg

It's a chin up bar. I'll start off with just my bodyweight, then do
them with a really heavy rucksuck on.
  #9   Report Post  
Colin Wilson
 
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It's a chin up bar. I'll start off with just my bodyweight, then do
them with a really heavy rucksuck on.


In that case, you need a solid fixing into brick, or at very least, the
framing of a stud wall. I`m slightly paranoid about fixings, but I would
be looking to use a rawlbolt or two personally, and they must go into a
solid wall.

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  #10   Report Post  
Christian McArdle
 
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In that case, you need a solid fixing into brick, or at very least, the
framing of a stud wall. I`m slightly paranoid about fixings, but I would
be looking to use a rawlbolt or two personally, and they must go into a
solid wall.


Agreed. The idea of using a couple of 25mm screws to hold a person's weight
frightens me. I would also be on rawlbolts here, or pre pilot drilled 6mm x
75mm screws into studwork, making sure they're tight, so that the main load
downwards load is taken between the wall and the attached item, rather than
relying on the screw's shear strength.

Christian.




  #11   Report Post  
Andy Dingley
 
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Default

On Wed, 27 Oct 2004 15:53:30 +0100, "Christian McArdle"
wrote:

The idea of using a couple of 25mm screws to hold a person's weight
frightens me.


Chin up bars _between_ walls are easy enough though. Because they
bridge two walls, they're a pure shear load on the fixing, with no
tendency to pull out.


Not that I wouldn't be using some honking-great plug or Rawlbolt
myself.

--
Smert' spamionam
  #12   Report Post  
Christian McArdle
 
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Chin up bars _between_ walls are easy enough though. Because they
bridge two walls, they're a pure shear load on the fixing, with no
tendency to pull out.


But it is surely better to relieve the fixing of any shear load by clamping
the attached device to the wall to provide friction between them? Then the
fixing is there purely to provide clamping force and not resist any
downwards force itself.

Christian.


  #13   Report Post  
James Hanley
 
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Andy Dingley wrote in message . ..
On Wed, 27 Oct 2004 15:53:30 +0100, "Christian McArdle"
wrote:

The idea of using a couple of 25mm screws to hold a person's weight
frightens me.


Chin up bars _between_ walls are easy enough though. Because they
bridge two walls, they're a pure shear load on the fixing, with no
tendency to pull out.


Not that I wouldn't be using some honking-great plug or Rawlbolt
myself.


what if the wall isn't brick, but is plaster?
  #14   Report Post  
Dave Liquorice
 
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On 27 Oct 2004 18:08:47 -0700, James Hanley wrote:

what if the wall isn't brick, but is plaster?


The wall will fall down under it's own weight. Plaster is just a
finish any load bearing, including its weight, is carried by something
else. Either the wall it is stuck to or the framing plasterboard is
fixed to.

--
Cheers
Dave. pam is missing e-mail



  #16   Report Post  
James Hanley
 
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"Christian McArdle" wrote in message . net...
Chin up bars _between_ walls are easy enough though. Because they
bridge two walls, they're a pure shear load on the fixing, with no
tendency to pull out.


But it is surely better to relieve the fixing of any shear load by clamping
the attached device to the wall to provide friction between them? Then the
fixing is there purely to provide clamping force and not resist any
downwards force itself.

Christian.


the bar is meant to fit between a doorpost(but my doorposts aren't
high enough, so i'm fitting it between 2 walls), does that mean that I
have wood screws and shouldn't be screwing them into a wall?
  #17   Report Post  
Christian McArdle
 
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the bar is meant to fit between a doorpost(but my doorposts aren't
high enough, so i'm fitting it between 2 walls), does that mean that I
have wood screws and shouldn't be screwing them into a wall?


You really need to find out what your wall is made from before you go any
further.

Christian.


  #18   Report Post  
James Hanley
 
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"Dave Liquorice" wrote in message ill.com...
On 27 Oct 2004 18:08:47 -0700, James Hanley wrote:

what if the wall isn't brick, but is plaster?


The wall will fall down under it's own weight. Plaster is just a
finish any load bearing, including its weight, is carried by something
else. Either the wall it is stuck to or the framing plasterboard is
fixed to.


ok, so would you and adam agree that if I got a wacking great Number 8
3" screw with a wacking great 3" fixing, then it'd go through the
plaster into the brick and do the job?

I think it has to be number 8(i'm assuming that's diamater), because
it came with things that screw into the wall like this

------- -----
| |
| |
| |
|------ -----

So the bar expands into those things. And those things have holes in
them where I screw them into the wall.

I guess I could make the holes bigger and use a thicker screw. But
would a number 8 3" screw go through the plaster into the brick and
do the job?

And what size fixing would I use for a 3" screw? The make i'd use
would be the one people keep mentioning in this thread
  #19   Report Post  
Christian McArdle
 
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I think it has to be number 8(i'm assuming that's diamater), because
it came with things that screw into the wall like this


I only work in metric. For this I would use a minimum of 6mm x 70mm,
assuming normal plaster depth, or rawlbolts. Ensure that you get well into
the brickwork. If it pushes in too easily, you've hit mortar and should
start again somewhere else. Ensure that the screw/bolt is tight. Remember
that its purpose is to pull the bracket onto the wall and it is the
wall/bracket interface that resists downwards movement, not just the
screw/bolt.

Christian.



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