I just built a bookcase from 3/4 oak plywood with real oak wood for
trim. I copied this from another bookcase that we purchased about 12
years ago. I am finding the shelves in mine are sagging from the
books. The old book case with same style and crafted shelves does not
have this problem. I was told that the core material in the newer
plywoods is crap and that is the problem. How do you pick plywood for
strength? I noticed in Home Depot the other day they had Oak plywood
that was stamped made in China on the edge and it looked far superior
to quality than what I used and was made by Boise. Any comments?
Well, I used to buy oak plywood from home depot.. Back when they
charged $50/sheet, it was pretty good quality (for B grade).. Now it's
down to $40/sheet, and it's crap.. the veneer comes off and there's
lots of Huge voids.. I had a project where I had to recut because under
the veneer was a huge void.. like 3 inches by 2 inches.. Fortunately,
when I was handling it, my finger broke through.. I would've really
been mad if that happened after the project was done.
Unfortunately, I bought 4 sheets of that crap, so it's going to be used
as garage shelves now.. Sadly, I have to drive 2.5 hours now to get
good oak ply at a reasonable price.
That's a pretty drastic statement.
Plywood works just fine for bookshelves, as long as they are suitably
designed with the limitations of the material in mind.
Certainly it's not as strong as solid wood, but you don't always need
You are talking about Lumber Core, almost unavailabe toda, and yes it is
more resistant to bending or flexing than plywood. However at least Ply
won't take a set like chipcore. If you are using ply, and I have for
bookshelves. It can be made far more sag or flex resistant by laminating on
a solid wood edge that is thicker than the board.
On Fri, 31 Mar 2006 09:43:48 +0200, Juergen Hannappel
I just got an Eagle America catalog today and they have a new item
listed - Extruded Aluminum shelf stiffeners. They are 48 inches long
and take a 3/4" shelf. Look on page 86 of the spring 2006 catalog.
Put a back on your shelves. It will prevent books from falling behind
the shelves as well as stiffen and strengthen everything. If you use
strong enough material for the back, you can even secure the shelves
along the back.
Alternatively, you could add a 1x2 to the back of the shelf, which if
placed on the base of the shelf would prevent books from being pushed
back too far and give you some fairly straight lumber to straighten the
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