will it stay up?

"Mike Marlow" wrote in message news:[email protected]...

>You just have to know the replies you're going to get to this thread!

;~)

>Sure sounds like stout enough construction to me.

I concur...

"Mike Marlow" <[email protected]> wrote in news:n4v3m1$ikf$1
@dont-email.me:

<...>

>> The knee will be firmly screwed to the structure of the table; I'm
>> planning to attach it to the wall via a sliding dovetail the 3/4" oak
>> pin of which will be screwed to a stud.
>>
>> I'm thinking it will be fine attached as I have outlined; not
>> sittable but satisfactory for its purpose. What do you think?
>
> You just have to know the replies you're going to get to this thread!

LOL.

> Sure sounds like stout enough construction to me.

I'd think so too. The 3" rail should be ample to stop the
ply from sagging, and the knee sounds more than stout enough
to hold up the end (you'd use a much smaller knee in a
sailing dinghy to support the mast, and that's dynamic load
with a lot of leverage).

I'm not sure you need to attach the knee to the wall - just
bearing against it might suffice since the top of the knee
is effectively connected thru the table. But the sliding
dovetail will be a technically elegant piece of work :-)

John

On 12/17/2015 3:54 PM, woodchucker wrote:
> On 12/17/2015 2:20 PM, dadiOH wrote:
>> I'm going to start working on a makup table for my wife. It will be
>> rather
>> like a return for a desk...sticks out at a right angle from her vanity.
>>
>> It will have a poplar frame covered by 3/4" ply on top of which there
>> will
>> be a couple of 3/4" soapstone tiles, each 1.5 ft. sq. It will have a 3"
>> mahogany rail around it to hide the poplar, ply and tile edges.
>> Basically,
>> it is a torsion box without a bottom.
>
> Then it's not a torsion box, the TB gains its strength by the top and
> bottom along with the webbing in between.
>
>>
>> It is about 37" long, 18" wide and will weigh around 50-60 pounds
>> (soapstone
>> is heavy).
>>
>> One long side abuts a wall and will be screwed to studs. One short side
>> will be supported by the vanity. To support the other short side, I'm
>> planning on a 1 1/2" thick mahogany knee, 12+" horizontally and about 10"
>> vertically.
>>
>> The knee will be firmly screwed to the structure of the table; I'm
>> planning
>> to attach it to the wall via a sliding dovetail the 3/4" oak pin of which
>> will be screwed to a stud.
>>
>> I'm thinking it will be fine attached as I have outlined; not sittable
>> but
>> satisfactory for its purpose. What do you think?
>>
>>
>
> I think the 3/4 ply will take the weight, but I think it will sag over
> time, even with the mahoganny edging. Are you planning on putting any
> thing under the 3/4 ply, a longeron, to help support the 37 Inches.
> basically from end to end, not across. I think that would help the
> mahogany take the load. Think 2x4 on edge under the ply going the length.
>

Scrap what I just said, I had the orientation wrong.

--
Jeff

On 12/17/2015 2:20 PM, dadiOH wrote:
> I'm going to start working on a makup table for my wife. It will be rather
> like a return for a desk...sticks out at a right angle from her vanity.
>
> It will have a poplar frame covered by 3/4" ply on top of which there will
> be a couple of 3/4" soapstone tiles, each 1.5 ft. sq. It will have a 3"
> mahogany rail around it to hide the poplar, ply and tile edges. Basically,
> it is a torsion box without a bottom.

Then it's not a torsion box, the TB gains its strength by the top and
bottom along with the webbing in between.

>
> It is about 37" long, 18" wide and will weigh around 50-60 pounds (soapstone
> is heavy).
>
> One long side abuts a wall and will be screwed to studs. One short side
> will be supported by the vanity. To support the other short side, I'm
> planning on a 1 1/2" thick mahogany knee, 12+" horizontally and about 10"
> vertically.
>
> The knee will be firmly screwed to the structure of the table; I'm planning
> to attach it to the wall via a sliding dovetail the 3/4" oak pin of which
> will be screwed to a stud.
>
> I'm thinking it will be fine attached as I have outlined; not sittable but
> satisfactory for its purpose. What do you think?
>
>

I think the 3/4 ply will take the weight, but I think it will sag over
time, even with the mahoganny edging. Are you planning on putting any
thing under the 3/4 ply, a longeron, to help support the 37 Inches.
basically from end to end, not across. I think that would help the
mahogany take the load. Think 2x4 on edge under the ply going the length.

--
Jeff

dadiOH wrote:
> I'm going to start working on a makup table for my wife. It will be
> rather like a return for a desk...sticks out at a right angle from
> her vanity.
> It will have a poplar frame covered by 3/4" ply on top of which there
> will be a couple of 3/4" soapstone tiles, each 1.5 ft. sq. It will
> have a 3" mahogany rail around it to hide the poplar, ply and tile
> edges. Basically, it is a torsion box without a bottom.
>
> It is about 37" long, 18" wide and will weigh around 50-60 pounds
> (soapstone is heavy).
>
> One long side abuts a wall and will be screwed to studs. One short
> side will be supported by the vanity. To support the other short
> side, I'm planning on a 1 1/2" thick mahogany knee, 12+" horizontally
> and about 10" vertically.
>
> The knee will be firmly screwed to the structure of the table; I'm
> planning to attach it to the wall via a sliding dovetail the 3/4" oak
> pin of which will be screwed to a stud.
>
> I'm thinking it will be fine attached as I have outlined; not
> sittable but satisfactory for its purpose. What do you think?

You just have to know the replies you're going to get to this thread!

Sure sounds like stout enough construction to me.

--

-Mike-
[email protected]