I've got 24" metal drawer slides attached to a case made of solid
quarter sawn cherry. Of course, the slides go across the grain. I'm
wondering if I need to be concerned about the case cracking due to
wood movement. The drawer slides (Accuride) have little slots about
1/4" long, but my wood movement calculations suggest that I ought to
plan for 3/4" of wood movement.
Is this OK? Anybody ever seen a case that was cracked by drawer
slides?
On Nov 24, 2:32=A0pm, Chris Friesen <[email protected]> wrote:
> On 11/24/2009 09:47 AM, [email protected] wrote:
>
> > I've got 24" metal drawer slides attached to a case made of solid
> > quarter sawn cherry. =A0 Of course, the slides go across the grain. =A0=
I'm
> > wondering if I need to be concerned about the case cracking due to
> > wood movement. =A0The drawer slides (Accuride) have little slots about
> > 1/4" long, but my wood movement calculations suggest that I ought to
> > plan for 3/4" of wood movement.
>
> According to the shrinkulator
> (http://www.woodbin.com/calcs/shrinkulator.htm), assuming a range of 25%
> to 60% relative humidity, this will result in moisture content range of
> 5.4 to 11. =A0Quartersawn means that you want to look at the radial
> change, which is 0.18" over 24".
>
> I think you're probably fine.
>
> Chris
The shrinkulator is handy. I was doing calculations based on
equations from Hoadley's book. How did I get 3/4"? Well, two
things. I was originally calculating for flat sawn maple and I think
I forgot to switch the numbers for quarter sawn. And I assumed a
broader moisture range, like 75% - 10%.
I guess I won't worry about it. Now if I can just get the drawer
slides adjusted so that the drawers are lined up....
On 11/24/2009 09:47 AM, [email protected] wrote:
> I've got 24" metal drawer slides attached to a case made of solid
> quarter sawn cherry. Of course, the slides go across the grain. I'm
> wondering if I need to be concerned about the case cracking due to
> wood movement. The drawer slides (Accuride) have little slots about
> 1/4" long, but my wood movement calculations suggest that I ought to
> plan for 3/4" of wood movement.
According to the shrinkulator
(http://www.woodbin.com/calcs/shrinkulator.htm), assuming a range of 25%
to 60% relative humidity, this will result in moisture content range of
5.4 to 11. Quartersawn means that you want to look at the radial
change, which is 0.18" over 24".
I think you're probably fine.
Chris
<[email protected]> wrote in message
news:[email protected]...
> I've got 24" metal drawer slides attached to a case made of solid
> quarter sawn cherry. Of course, the slides go across the grain. I'm
> wondering if I need to be concerned about the case cracking due to
> wood movement. The drawer slides (Accuride) have little slots about
> 1/4" long, but my wood movement calculations suggest that I ought to
> plan for 3/4" of wood movement.
Oh good lord no, 3/4" movement would be if you submerged it in water and
left it there. I seriously doubt you would ever see more than 1/8" movement
over 24" under normal circumstances. Put the screws in the slotted holes.
If you still have doubts, elongate the slotted holes.
>
> Is this OK? Anybody ever seen a case that was cracked by drawer
> slides?
I have never had that problem having installed hundreds of slides.
<[email protected]> wrote in message
news:[email protected]...
> I've got 24" metal drawer slides attached to a case made of
> solid
> quarter sawn cherry. Of course, the slides go across the
> grain. I'm
> wondering if I need to be concerned about the case cracking due
> to
> wood movement. The drawer slides (Accuride) have little slots
> about
> 1/4" long, but my wood movement calculations suggest that I
> ought to
> plan for 3/4" of wood movement.
>
> Is this OK? Anybody ever seen a case that was cracked by
> drawer
> slides?
>
You might want to check the the decimal point. <Grin> Just put
the screws in the middle of the slots and it'll all work out fine.
--
Nonny
What does it mean when drool runs
out of both sides of a drunken
Congressman's mouth?
The floor is level.