Doweled Tee Joint: Any need to apply glue to the wood faces?

On 12/8/2014 2:58 PM, Greg Guarino wrote:
> I'm going to be gluing up the joints shown in the foreground of this
> drawing:
>
> https://www.flickr.com/photos/gdguarino/14401556002/in/set-72157644207411490
>
>
> ... the ones with three dowels per joint.
>
> Here's what the assemblies will look like:
>
> https://www.flickr.com/photos/gdguarino/15070392677/in/set-72157644207411490/lightbox/
>
>
> The wood surfaces are edge grain and end grain. Is there any need, any
> point, any benefit to applying glue to those surfaces? Or should I just
> apply the glue to the dowels and holes?

I glue the faces. People will tell you it's not useful but it gives it
more strength.

--
Jeff

On 12/8/2014 1:58 PM, Greg Guarino wrote:
>
> The wood surfaces are edge grain and end grain. Is there any need, any
> point, any benefit to applying glue to those surfaces? Or should I just
> apply the glue to the dowels and holes?

Use glue.

While not the strongest bond with glue in that situation, every little
bit adds to overall joint strength.

--
eWoodShop: www.eWoodShop.com
Wood Shop: www.e-WoodShop.net
https://www.google.com/+eWoodShop
https://plus.google.com/+KarlCaillouet/posts
http://www.custommade.com/by/ewoodshop/
KarlCaillouet@ (the obvious)

On Tuesday, December 9, 2014 10:00:11 AM UTC-6, Greg Guarino wrote:

> To all:
>=20
> That's not the answer I was expecting, so I'm glad I asked. In reality,=
=20
> there would likely be glue on those surfaces anyway; spillover from=20
> applying it in the holes and being squeezed out by the dowels. But I'll=
=20
> make sure to get a coating over the whole surface.
>=20
> Thanks.

If not much strength, it does add more stability by filling the gaps on mat=
ing surfaces. For fun, to see how much it adds glue up two blocks of the s=
ame dimension of your project, but without dowels. Leave overnight, then g=
o out in the morning and see how much it takes to break the joint. Probabl=
y only a few pounds, but translated to what you are doing, it is a signific=
ant contribution.

Robert

On 12/9/2014 12:49 PM, [email protected] wrote:
> On Tuesday, December 9, 2014 10:00:11 AM UTC-6, Greg Guarino wrote:
>
>> To all:
>>
>> That's not the answer I was expecting, so I'm glad I asked. In reality,
>> there would likely be glue on those surfaces anyway; spillover from
>> applying it in the holes and being squeezed out by the dowels. But I'll
>> make sure to get a coating over the whole surface.
>>
>> Thanks.
>
> If not much strength, it does add more stability by filling the gaps on mating surfaces. For fun, to see how much it adds glue up two blocks of the same dimension of your project, but without dowels. Leave overnight, then go out in the morning and see how much it takes to break the joint. Probably only a few pounds, but translated to what you are doing, it is a significant contribution.
>
> Robert
>


Exactly, any gaps will be filled rather than leace a collecting
place/crack for dust.

On 12/8/2014 4:30 PM, Swingman wrote:
> On 12/8/2014 1:58 PM, Greg Guarino wrote:
>>
>> The wood surfaces are edge grain and end grain. Is there any need, any
>> point, any benefit to applying glue to those surfaces? Or should I just
>> apply the glue to the dowels and holes?
>
> Use glue.
>
> While not the strongest bond with glue in that situation, every little
> bit adds to overall joint strength.
>


Yeah!

On 12/8/2014 6:57 PM, woodchucker wrote:
> On 12/8/2014 2:58 PM, Greg Guarino wrote:
>> I'm going to be gluing up the joints shown in the foreground of this
>> drawing:
>>
>> https://www.flickr.com/photos/gdguarino/14401556002/in/set-72157644207411490
>>
>>
>>
>> ... the ones with three dowels per joint.
>>
>> Here's what the assemblies will look like:
>>
>> https://www.flickr.com/photos/gdguarino/15070392677/in/set-72157644207411490/lightbox/
>>
>>
>>
>> The wood surfaces are edge grain and end grain. Is there any need, any
>> point, any benefit to applying glue to those surfaces? Or should I just
>> apply the glue to the dowels and holes?
>
> I glue the faces. People will tell you it's not useful but it gives it
> more strength.
>
To all:

That's not the answer I was expecting, so I'm glad I asked. In reality,
there would likely be glue on those surfaces anyway; spillover from
applying it in the holes and being squeezed out by the dowels. But I'll
make sure to get a coating over the whole surface.

Thanks.

On 12/9/2014 2:24 PM, Leon wrote:
> On 12/9/2014 12:49 PM, [email protected] wrote:
>> On Tuesday, December 9, 2014 10:00:11 AM UTC-6, Greg Guarino wrote:
>>
>>> To all:
>>>
>>> That's not the answer I was expecting, so I'm glad I asked. In reality,
>>> there would likely be glue on those surfaces anyway; spillover from
>>> applying it in the holes and being squeezed out by the dowels. But I'll
>>> make sure to get a coating over the whole surface.
>>>
>>> Thanks.
>>
>> If not much strength, it does add more stability by filling the gaps
>> on mating surfaces. For fun, to see how much it adds glue up two
>> blocks of the same dimension of your project, but without dowels.
>> Leave overnight, then go out in the morning and see how much it takes
>> to break the joint. Probably only a few pounds, but translated to
>> what you are doing, it is a significant contribution.
>>
>> Robert
>>
>
>
> Exactly, any gaps will be filled rather than leace a collecting
> place/crack for dust.

Funny thing. Prior to my participation here, I was unaware that end
grain does not allow a strong glue joint. So I would have glued the
faces. Then I learned ... a little, and left to my own devices might
well have left the faces bare. Now I will heed the more nuanced advice
that it makes a lousy bond, but glue it up anyway; i.e., going back to
the practice I'd have used before I "knew" anything.