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?

wrote in message
...
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.

wrote in message
...
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.

On 11/24/2009 09:47 AM, 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

On Nov 24, 2:32*pm, Chris Friesen wrote:
On 11/24/2009 09:47 AM, 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

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....