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Joining Timber



 
 
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  #11  
Old July 4th 07, 02:03 AM posted to uk.d-i-y
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Posts: 15,433
Default Joining Timber

The Medway Handyman wrote:
Best way to do end to end joints in 4 x 2 ? In other words to make 2 x
2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky washer
things - joint doesn't have to be in line, just resist deflection. Timber
on edge.


lap and timber connectors would work and probably be more than adequate
for a deck.

Alternatively a longish scarf joint, with bolts through the verticals.
(Same technique as can be used to extend a ridge beam in a roof).

You can either do the simple one with a 1 in 8 to 1 in 10 slope on the
timber, glued up and bolts either vertical (or drilled at an angle so as
to be perpendicular to the scarf).

(counter sink the nut and bolt if you want a flat profile):


B B
----------------------------------
/
/
/
--------/-------------------------
B B

(bolts at B)

The stronger one, uses a profile like:
________________________________
\
/
/
/
________ \_____________________


The sloped cut is the same, but does a 90 degree turn a little way in
from each edge on top and bottom. Once glued and bolted this is better
at transferring the bending moment into compressive forces on the top of
the joist, and reduces the shear loading on the glue line.

The first is easy to cut on a SCMS, the latter requires a stopped cut so
is best done with a handsaw or a decent jigsaw. (you cut it in three
goes - the slope from one side to the change in direction at the other
edge, then the cut from the far edge to meet the slope, and finally trim
off the sharp point).


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/
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  #12  
Old July 4th 07, 05:39 AM posted to uk.d-i-y
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Posts: 1,843
Default Joining Timber

On Jul 4, 10:28 am, "The Medway Handyman"
wrote:
Best way to do end to end joints in 4 x 2 ? In other words to make 2 x
2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky washer
things - joint doesn't have to be in line, just resist deflection. Timber
on edge.


Drill two 12" holes down each piece and Araldite two pieces of 24" D12
reinforcing steel into the holes.

  #13  
Old July 4th 07, 01:38 PM posted to uk.d-i-y
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Posts: 13
Default Joining Timber

On 3 Jul, 23:28, "The Medway Handyman"
wrote:
Best way to do end to end joints in 4 x 2 ? In other words to make 2 x
2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky washer
things - joint doesn't have to be in line, just resist deflection. Timber
on edge.

Any thoughts?

--
Dave
The Medway Handymanwww.medwayhandyman.co.uk
01634 717930
07850 597257


Place a short piece, say 1metre, alongside the two that you want to
join so that it overlaps the joint by 0.5 metre each side and then
glue and screw the short piece to the two long pieces. OK, at the
joint area you will have a piece of wood that is 4" x 4". Plenty of
PVA glue over the joint area before you screw the lot together. When
that sets you can even back the screws out and then try and break the
joint by jumping on it.

Chris.

  #14  
Old July 4th 07, 02:32 PM posted to uk.d-i-y
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Posts: 2,232
Default Joining Timber

Matty F wrote:
On Jul 4, 10:28 am, "The Medway Handyman"
wrote:
Best way to do end to end joints in 4 x 2 ? In other words to make 2 x
2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky washer
things - joint doesn't have to be in line, just resist deflection. Timber
on edge.


Drill two 12" holes down each piece and Araldite two pieces of 24" D12
reinforcing steel into the holes.


Your drilling would need to be so accurate that I'd rule it out for an
on-site situation
  #15  
Old July 4th 07, 06:07 PM posted to uk.d-i-y
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Posts: 9,377
Default Joining Timber


"The Medway Handyman" wrote in message
...
Andy Hall wrote:
On 2007-07-03 23:28:28 +0100, "The Medway Handyman"
said:

Best way to do end to end joints in 4 x 2 ? In other words to make
2 x 2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky washer
things - joint doesn't have to be in line, just resist deflection.
Timber on edge.

Any thoughts?


Umm....

Buy a 5.4m length and cut it down?


Twas just an example! I need to join to get to 9+ metres.

What's the application? Will the joint be on show?


Bearer for deck - never be seen - ugly no problem!


Just lap them above a support.
No need for any extra glue if they are not load bearing in any way.
If you are worried that the screws will not be in-line then butt them and
screw a strip either side.


  #16  
Old July 4th 07, 11:03 PM posted to uk.d-i-y
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Posts: 285
Default Joining Timber


"The Medway Handyman" wrote in message
...
Best way to do end to end joints in 4 x 2 ? In other words to make 2 x
2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky washer
things - joint doesn't have to be in line, just resist deflection. Timber
on edge.

Any thoughts?


Have you thought about using a 3.5m long nail?





  #17  
Old July 4th 07, 11:38 PM posted to uk.d-i-y
external usenet poster
 
Posts: 8,323
Default Joining Timber

Arthur2 wrote:
"The Medway Handyman" wrote in
message ...
Best way to do end to end joints in 4 x 2 ? In other words to make
2 x 2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky washer
things - joint doesn't have to be in line, just resist deflection. Timber
on edge.

Any thoughts?


Have you thought about using a 3.5m long nail?



Doh! Why didn't I think of that? Do Screwfix do them?


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257


  #18  
Old July 5th 07, 01:01 AM posted to uk.d-i-y
external usenet poster
 
Posts: 285
Default Joining Timber


"The Medway Handyman" wrote in message
...
Arthur2 wrote:
"The Medway Handyman" wrote in
message ...
Best way to do end to end joints in 4 x 2 ? In other words to make
2 x 2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky washer
things - joint doesn't have to be in line, just resist deflection.
Timber on edge.

Any thoughts?


Have you thought about using a 3.5m long nail?



Doh! Why didn't I think of that? Do Screwfix do them?



Nope but they have a subsidiary company...try
http://www.screewwwwwwwwwwwwwwwwwwww... xxxxxxx.co.uk




  #19  
Old July 5th 07, 01:06 AM posted to uk.d-i-y
external usenet poster
 
Posts: 8,323
Default Joining Timber

Arthur2 wrote:
"The Medway Handyman" wrote in
message ...
Arthur2 wrote:
"The Medway Handyman" wrote in
message ...
Best way to do end to end joints in 4 x 2 ? In other words to make
2 x 2.4's into a 4.8 ish length.

I was thinking either lap joint & glue & bolts or those spiky
washer things - joint doesn't have to be in line, just resist
deflection. Timber on edge.

Any thoughts?


Have you thought about using a 3.5m long nail?



Doh! Why didn't I think of that? Do Screwfix do them?



Nope but they have a subsidiary company...try
http://www.screewwwwwwwwwwwwwwwwwwww... xxxxxxx.co.uk


LOL!


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257


  #20  
Old July 5th 07, 12:36 PM posted to uk.d-i-y
external usenet poster
 
Posts: 221
Default Joining Timber

On 5 Jul, 00:06, "The Medway Handyman"
wrote:
Arthur2 wrote:
"The Medway Handyman" wrote in
...
Arthur2 wrote:
"The Medway Handyman" wrote in
...
Best way to do end to end joints in 4 x 2 ? In other words to make
2 x 2.4's into a 4.8 ish length.


I was thinking either lap joint & glue & bolts or those spiky
washer things - joint doesn't have to be in line, just resist
deflection. Timber on edge.


Any thoughts?


Have you thought about using a 3.5m long nail?




Doh! Why didn't I think of that? Do Screwfix do them?


Nope but they have a subsidiary company...try
http://www.screewwwwwwwwwwwwwwwwwwww...ffffffffffffff...


LOL!

--
Dave
The Medway Handymanwww.medwayhandyman.co.uk
01634 717930
07850 597257



Which begs the question. Well I think it does anyway.
What size hammer would be needed to belt in a 2.5m long nail.
I am guessing that the hammer head would need to be about the same
size
as row of five 3 story terraced houses. But this is obviously not
based on scientific analysis.

Arthur

 




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